Real money slot apps can deliver the action that slot machines provide without any of the hassle. As long as you have a connected device of some kind, such as a phone, tablet or smartwatch, you’ll be ready to spin and win. And when we say win, we mean that you can indeed win huge jackpots as if you were playing in the casino.

Gambling Apps where you play casino games and win real money have become all the rage in the mobile gambling world. It makes sense that apps that simulate slot machine play would be popular as well, especially since many casino-goers prefer slots above all else. You can play slot games for money with these apps and get the same kind of excitement as you would from a live casino.

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There are many of these online slots apps available to you, as you’ll find out when you search in the app store. The key is knowing how to find the right apps in terms of their reliability and potential for payback. Otherwise, you could end up having a poor experience as you’re trying to win big.

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A mobile casino is a website, while you’d download a mobile slot app directly to your phone to play slots on the go. You’ll have noticed that we only recommend mobile casinos in our top list. Some of these casinos have their own dedicated mobile slot apps that you might prefer to play from.

In the following article, we’ll tell you everything you need to know about these real money slot machine apps. We’ll explain how they work and the different types of mobile slot games you can get from them. We’ll also explain how to find the best slots apps to make the most out of your mobile gaming action.

Best Slot Machine Apps for 2021

Don’t make the mistake of thinking that it’s a good idea to sign up for the first real money slots app that you find. Take the time to find what the best slots apps are first. It’s an important choice for you to make, since you’ll have real money at stake.

We’re going to help you with that decision. After doing the research and checking out all the top casino slots apps, we’ve narrowed it down to the following list when it comes to the best slot apps. Check it out below.

Why is it important to know which real money slots apps stand out above the rest? Well, you can’t take the chance with a lesser site, especially when you consider all the things that might go wrong. You can have personal information compromised or the money that you used to fund your account can be lost or stolen.

Even if those worst-case scenarios don’t take place, you could still end up having an experience that is less than ideal. Why settle for a mediocre experience when you can have the best? The mobile online casinos with slots listed above can give you that kind of premium experience that you’re craving when partaking in online gambling.

How Slot Games Work on Real Money Casino Apps

It’s a good idea to have a feel for how online casino apps work before you get started. Having this knowledge will help you make the right choice when it comes to picking the app that’s best for you.

Method of Play

In terms of slots apps that pay real money, it’s pretty much the same thing as if you were in a casino. Once you’ve allotted a certain amount of money for play from the bankroll that you’ve established at the app, you’ll make a wager. You’ll then hit the button on the screen to activate the spin.

You’ll see the reels spinning as if you were playing within a live casino. And if the reels make one of the winning combinations listed on the pay table, you’ll win actual money in return for what you’ve bet.

As for how those reels spin, it’s the same process as you would find in a casino. Random number generator software within the game will determine the outcome the moment that you hit the button. The “spin” is just for show.

Multiline Action

One thing that you’ll find when playing slots apps that pay real money is that they mostly resemble the types of multiline video slots that dominate casino floors these days. You’ll see a grid on the screen with three rows full of five symbols each. And these different lines allow you multiple ways to win.

You can wager on as many lines as the real money slots app in question allows. When you do this, you’ll not only have chances at winning based on the horizontal rows on the screen, but also on lines that zig-zag across the screen. Playing in this manner allows for a much faster pace and a much greater chance of winning a lot of money in a short period of time.

Special Features

Multiline slot games apps often include extra features which will pop up as you play. These features are usually activated by some sort of predetermined spin. This can be a combination of symbols or even a single symbol appearing in a particular place.

Some of the possible bonuses you can earn with these types of games include the following:

• Free spins: These allow you to win money with the right spins without risking anything while the bonus is in place.
• Multipliers: These do exactly as they sound, multiplying your winnings from what they might normally be according to the pay table.
• Special pay tables: These special pay tables usually offer more than what you would find on the normal one associated with the game.

Special features in real money slots apps make games a lot more fun to play and can really boost your winnings. Luckily, many of the top slot apps for real money offer these great features to you.

Choosing Slots Apps by Payback

If all other things are equal in terms of the app offering games, one of the ways you can choose is based on how much payback is expected. You can measure this in many different ways.

Payback Percentage

This is the easiest way to measure how a real money slots app will pay you back in the long-term. It is a percentage against a breakeven level of 100%. As it drops below 100%, the house edge rises.

Of course, this isn’t to say that your actual outcome will turn out that way. If you are playing a real money slots app for a small amount of time, luck will drive your winnings upward or downward. But once you play for a long amount of time, you can expect results closer to the payback percentage.

Jackpots

For some people, all they want to know about the real money slots apps is how much they can win on a single spin. Those thrill-seekers should then be in search of the games that have the highest amount on the pay table. If that’s you, you should also be aware of any special features or bonuses that can raise that amount even higher.

You might even be able to find certain real money casino slots apps that include progressive jackpots. A progressive jackpot is one that keeps rising as people play until someone hits that lucky winning spin.

Variance

Variance measures the kinds of twists and turns you might expect your bankroll to take while playing a particular game on a slots app. When you’re playing a game with high variance, you can expect those swings to be drastic and frequent. Meanwhile, low variance slots games will offer you steadier play.

Each of these types of online slots app games have strengths and weaknesses. For example, a low-variance game will give you a better chance to play for a long time on a small bankroll. You’d just have to accept that you’ll have less of a chance at winning a lot in a short amount of time.

High-variance slots apps to win money give you just those kinds of opportunities. But you also have to be prepared for the possibility that your bankroll could become depleted in a hurry. You can usually tell whether a game is high or low variance by the discrepancy between high and low-paying spins on the pay table; the bigger the discrepancy, the higher the variance.

Advantages of Playing on Real Money Slot Apps

You might be wondering, if slots apps resemble actual slot machine play so much, then why do they stand out? In truth, real money slot machine apps possess many advantages over their casino counterparts. Take a look at just a few reasons why you might choose them.

Convenience

This is the most obvious reason you would choose a slots app over an actual slot machine. With the slots app, you can take it with you wherever you go. If you’re fond of using apps on your smartphone, tablet, or smartwatch, you’ll quickly understand this.

Many people like to play casino games but don’t like the hassle of actually being at the casino. After all, that means dealing with the traffic to get there, the parking once you’re on site, and the crowds inside the place. With a casino slot games app, you don’t have to worry about any of that.

Portability

Casino websites can also provide you with slot machine play for real money without the need to be in the casino. But these websites often require you being at your computer to play them. If you’ve ever played slots games from a browser on a phone, tablet or watch, you know the experience can be a little lacking.

In addition, many people don’t like using their computer for gambling purposes. This is especially true if there’s any type of download necessary. With a real money slot app, you can keep your computer clear of all that.

Availability

When you go to a casino, you are limited to the slot machines that are there on the floor. Maybe you’ll be lucky enough to find the game that you want to play. But there’s a good chance that it either won’t be there or will be occupied if it is.

When you’re playing a slot machine app, however, you have your pick of any game you want by searching the app stores to your heart’s content. And you never have to wait for it to open up. It’s like you have an infinite virtual slot machine floor at your fingertips at all times.

How to Choose the Best Slots Apps

Earlier in this article, we gave you a list of what we believed were the best slot machine apps available to you on various devices. Even though you can’t go wrong choosing one of those apps, it would be a good idea for you to familiarize yourself with the reasons they’re at the top. That way, if you need to, you can make a choice on your own.

Here are some of the qualities that you should be seeking from potential slot games apps.

Reliable Payback

If you’re going to be playing online slots apps for real money, you’re going to want to make sure that the money owed to you can be collected at some point. This means that the app possesses a system of deposits and withdrawals that is easily understood and clearly detailed. This will put your mind at ease as to whether you’ll be able to enjoy the fruits of your slots apps play.

Funding Flexibility

When you sign up for a real money slots app, the first thing you’ll have to do is decide how you want to fund your gambling. The best slot apps to win money give you many different options to do this, so you’re not boxed into using a payment method that doesn’t make the most financial sense to you.

Sights and Sounds

If you want the same excitement from slots apps for real money than you would get from an actual slot machine, you’ll want the same kinds of graphics, albeit on a smaller scale. The best slots apps can make you feel that same kind of rush when you hit a jackpot and see the lights and hear the sounds. In addition, these online casino slot apps can also bring you some of the intricacies of themed slot machines onto your small screen.

Big Bonuses

You’ll want slot apps with real rewards to give you a little something extra for your gambling dollar. That could come in the form of deposit bonuses or other free perks. Our list of best slot machine apps for real money even contains slots apps with free spin bonuses. Any app that doesn’t offer something to you for your business should be avoided.

Error-Free Gameplay

One of the concerns with inferior slot machine apps to win real money are technical problems. Imagine the frustration of being on the edge of a winning spin only to have the game freeze. With the most reliable real money slots apps, you don’t have to worry about it.

Helpful Customer Service

Even with a reliable slots app, you might end up having concerns, questions, or problems. The best apps are backed by outstanding customer service that will do whatever they can to help alleviate your issues. These customer service agents should also keep in steady contact with you to let you know about any new promotions or offers.

If you use these six qualities as a kind of checklist, you can be relatively sure of choosing a solid real money slots app. You’ll put your mind at ease with a little bit of research. And the effort it takes to do that will be well worth the peace of mind you’ll get out of it.

Where to Find Online Slots Apps

App Stores

Whether you’re an Apple fan, an Android user, or a devotee of another company, you’ll likely have an app store at your disposal where you’ll be able to download real money slots apps. It’s just a matter of searching these stores for the slot apps in which you might have the most interest. Most of these stores will have rating systems, based on customer reviews, that you can use to judge these apps.

Once you find real money slots apps for Android or iPhone, you’ll have to download it onto the device. Ideally, your favorite real cash slot apps will be ones that can be used on multiple devices. That way, you’ll never be without them in a pinch. If you aren’t looking for real money play, you’ll also be able to find free slots apps in any app store.

Casino-Based Apps

Most major casinos within the United States and throughout the world possess some sort of online component to their business. From there, it’s only a small leap to expect them to also have a gambling app of some kind. And it stands to reason that these apps will devote much of its space to slots games.

When you come upon the app listed on a casino website, clicking on it should take you right to an app store. If you use an app tied to a casino, it’s possible that any gameplay that you enjoy could be counted in loyalty rewards programs. Therefore, if you go to a certain casino a lot, it might make financial sense for you to choose a real money slots app from there, if there is one, in order to take full advantage.

Compatibility

You should never overlook this issue when it comes to choosing the right slots app. After all, you might find a real money slots app with great bonuses and a wide selection of slots games. But if it doesn’t work on your preferred device, it won’t do you a lot of good.

Therefore, choosing from the above list of Android and iPhone slots apps should be pretty safe for you in terms of compatibility. But if you go off the board a bit, you could run into some problems with using an app on the device of your choice.

Real Money Slots Apps FAQ

Can You Use Strategy for Real Money Slots Apps?Slot machines are one of the casino games where luck is the driving factor. There isn’t anything you can really do to change your odds. Your chances are determined by the pay table and the predetermined frequency of winning spins.

One way you can control your slots apps play in a way is to choose your game wisely. If you choose a game that’s tuned into what you’re hoping to get out of it, such as long-term success or perhaps short-term high payouts, you’ll have a better chance of getting the results that you want.

How Can I Lower the House Edge on Slot Apps?As we just mentioned, there is no way to apply strategy to your slots play. You just have to hit the “spin” button and hope things work out in your favor. But there are ways to mitigate the edge that the house has against you.

One of those methods is to sign up for multiple free to install slots apps. If you do, you can get bonuses from multiple entities. When you apply those to your gameplay, you could cut into your projected losses. That can certainly help in the long run.

Is It More Important to Choose My Favorite Slots Game or the Best Slots App?Ideally, you’ll be able to find your favorite slots variation on a top app, so that won’t normally be a dilemma. But if you find your favorite game isn’t available at one of the recommended real money slot apps, you might want to broaden your horizons and choose a different slots game.

The bad things that could happen when you choose an inferior site could easily outweigh any positives you get from your favorite game. It’s better to choose a solid slots app and then adjust to a different game. In that way, you’re protected from the negatives and can still enjoy the benefits that online slot machine apps offer as a whole.

Conclusion on Mobile Slot Apps

We hope that you now have a hold of the basics of real money slots apps and are ready to explore a little bit more. Take your time choosing your app, first and foremost. Then, get ready to enjoy all the action.

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Get Rich Slots App

When you deploy your web app, web app on Linux, mobile back end, or API app to Azure App Service, you can use a separate deployment slot instead of the default production slot when you're running in the Standard, Premium, or Isolated App Service plan tier. Deployment slots are live apps with their own host names. App content and configurations elements can be swapped between two deployment slots, including the production slot.

Deploying your application to a non-production slot has the following benefits:

• You can validate app changes in a staging deployment slot before swapping it with the production slot.
• Deploying an app to a slot first and swapping it into production makes sure that all instances of the slot are warmed up before being swapped into production. This eliminates downtime when you deploy your app. The traffic redirection is seamless, and no requests are dropped because of swap operations. You can automate this entire workflow by configuring auto swap when pre-swap validation isn't needed.
• After a swap, the slot with previously staged app now has the previous production app. If the changes swapped into the production slot aren't as you expect, you can perform the same swap immediately to get your 'last known good site' back.

Each App Service plan tier supports a different number of deployment slots. There's no additional charge for using deployment slots. To find out the number of slots your app's tier supports, see App Service limits.

To scale your app to a different tier, make sure that the target tier supports the number of slots your app already uses. For example, if your app has more than five slots, you can't scale it down to the Standard tier, because the Standard tier supports only five deployment slots.

Add a slot

The app must be running in the Standard, Premium, or Isolated tier in order for you to enable multiple deployment slots.

1. in the Azure portal, search for and select App Services and select your app.

2. In the left pane, select Deployment slots > Add Slot.

   Note

   If the app isn't already in the Standard, Premium, or Isolated tier, you receive a message that indicates the supported tiers for enabling staged publishing. At this point, you have the option to select Upgrade and go to the Scale tab of your app before continuing.

3. In the Add a slot dialog box, give the slot a name, and select whether to clone an app configuration from another deployment slot. Select Add to continue.

   You can clone a configuration from any existing slot. Settings that can be cloned include app settings, connection strings, language framework versions, web sockets, HTTP version, and platform bitness.

4. After the slot is added, select Close to close the dialog box. The new slot is now shown on the Deployment slots page. By default, Traffic % is set to 0 for the new slot, with all customer traffic routed to the production slot.

5. Select the new deployment slot to open that slot's resource page.

   The staging slot has a management page just like any other App Service app. You can change the slot's configuration. To remind you that you're viewing the deployment slot, the app name is shown as <app-name>/<slot-name>, and the app type is App Service (Slot). You can also see the slot as a separate app in your resource group, with the same designations.

6. Select the app URL on the slot's resource page. The deployment slot has its own host name and is also a live app. To limit public access to the deployment slot, see Azure App Service IP restrictions.

The new deployment slot has no content, even if you clone the settings from a different slot. For example, you can publish to this slot with Git. You can deploy to the slot from a different repository branch or a different repository.

What happens during a swap

Swap operation steps

When you swap two slots (usually from a staging slot into the production slot), App Service does the following to ensure that the target slot doesn't experience downtime:

1. Apply the following settings from the target slot (for example, the production slot) to all instances of the source slot:

   • Slot-specific app settings and connection strings, if applicable.
   • Continuous deployment settings, if enabled.
   • App Service authentication settings, if enabled.

   Any of these cases trigger all instances in the source slot to restart. During swap with preview, this marks the end of the first phase. The swap operation is paused, and you can validate that the source slot works correctly with the target slot's settings.

2. Wait for every instance in the source slot to complete its restart. If any instance fails to restart, the swap operation reverts all changes to the source slot and stops the operation.

3. If local cache is enabled, trigger local cache initialization by making an HTTP request to the application root ('/') on each instance of the source slot. Wait until each instance returns any HTTP response. Local cache initialization causes another restart on each instance.

4. If auto swap is enabled with custom warm-up, trigger Application Initiation by making an HTTP request to the application root ('/') on each instance of the source slot.

   If applicationInitialization isn't specified, trigger an HTTP request to the application root of the source slot on each instance.

   If an instance returns any HTTP response, it's considered to be warmed up.

5. If all instances on the source slot are warmed up successfully, swap the two slots by switching the routing rules for the two slots. After this step, the target slot (for example, the production slot) has the app that's previously warmed up in the source slot.

6. Now that the source slot has the pre-swap app previously in the target slot, perform the same operation by applying all settings and restarting the instances.

At any point of the swap operation, all work of initializing the swapped apps happens on the source slot. The target slot remains online while the source slot is being prepared and warmed up, regardless of where the swap succeeds or fails. To swap a staging slot with the production slot, make sure that the production slot is always the target slot. This way, the swap operation doesn't affect your production app.

Which settings are swapped?

When you clone configuration from another deployment slot, the cloned configuration is editable. Some configuration elements follow the content across a swap (not slot specific), whereas other configuration elements stay in the same slot after a swap (slot specific). The following lists show the settings that change when you swap slots.

Settings that are swapped:

• General settings, such as framework version, 32/64-bit, web sockets
• App settings (can be configured to stick to a slot)
• Connection strings (can be configured to stick to a slot)
• Handler mappings
• Public certificates
• WebJobs content
• Hybrid connections *
• Service endpoints *
• Azure Content Delivery Network *

Features marked with an asterisk (*) are planned to be unswapped.

Settings that aren't swapped:

• Publishing endpoints
• Custom domain names
• Non-public certificates and TLS/SSL settings
• Scale settings
• WebJobs schedulers
• IP restrictions
• Always On
• Diagnostic settings
• Cross-origin resource sharing (CORS)
• Virtual network integration

Note

To make these settings swappable, add the app setting WEBSITE_OVERRIDE_PRESERVE_DEFAULT_STICKY_SLOT_SETTINGS in every slot of the app and set its value to 0 or false. These settings are either all swappable or not at all. You can’t make just some settings swappable and not the others.

Certain app settings that apply to unswapped settings are also not swapped. For example, since diagnostic settings are not swapped, related app settings like WEBSITE_HTTPLOGGING_RETENTION_DAYS and DIAGNOSTICS_AZUREBLOBRETENTIONDAYS are also not swapped, even if they don't show up as slot settings.

To configure an app setting or connection string to stick to a specific slot (not swapped), go to the Configuration page for that slot. Add or edit a setting, and then select deployment slot setting. Selecting this check box tells App Service that the setting is not swappable.

Swap two slots

You can swap deployment slots on your app's Deployment slots page and the Overview page. For technical details on the slot swap, see What happens during swap.

Important

Before you swap an app from a deployment slot into production, make sure that production is your target slot and that all settings in the source slot are configured exactly as you want to have them in production.

To swap deployment slots:

1. Go to your app's Deployment slots page and select Swap.

   The Swap dialog box shows settings in the selected source and target slots that will be changed.

2. Select the desired Source and Target slots. Usually, the target is the production slot. Also, select the Source Changes and Target Changes tabs and verify that the configuration changes are expected. When you're finished, you can swap the slots immediately by selecting Swap.

   To see how your target slot would run with the new settings before the swap actually happens, don't select Swap, but follow the instructions in Swap with preview.

3. When you're finished, close the dialog box by selecting Close.

If you have any problems, see Troubleshoot swaps.

Swap with preview (multi-phase swap)

Before you swap into production as the target slot, validate that the app runs with the swapped settings. The source slot is also warmed up before the swap completion, which is desirable for mission-critical applications.

When you perform a swap with preview, App Service performs the same swap operation but pauses after the first step. You can then verify the result on the staging slot before completing the swap.

If you cancel the swap, App Service reapplies configuration elements to the source slot.

To swap with preview:

1. Follow the steps in Swap deployment slots but select Perform swap with preview.

   The dialog box shows you how the configuration in the source slot changes in phase 1, and how the source and target slot change in phase 2.

2. When you're ready to start the swap, select Start Swap.

   When phase 1 finishes, you're notified in the dialog box. Preview the swap in the source slot by going to https://<app_name>-<source-slot-name>.azurewebsites.net.

3. When you're ready to complete the pending swap, select Complete Swap in Swap action and select Complete Swap.

   To cancel a pending swap, select Cancel Swap instead.

4. When you're finished, close the dialog box by selecting Close.

If you have any problems, see Troubleshoot swaps.

To automate a multi-phase swap, see Automate with PowerShell.

Roll back a swap

If any errors occur in the target slot (for example, the production slot) after a slot swap, restore the slots to their pre-swap states by swapping the same two slots immediately.

Configure auto swap

Note

Auto swap isn't supported in web apps on Linux.

Auto swap streamlines Azure DevOps scenarios where you want to deploy your app continuously with zero cold starts and zero downtime for customers of the app. When auto swap is enabled from a slot into production, every time you push your code changes to that slot, App Service automatically swaps the app into production after it's warmed up in the source slot.

Note

Before you configure auto swap for the production slot, consider testing auto swap on a non-production target slot.

To configure auto swap:

1. Go to your app's resource page. Select Deployment slots > <desired source slot> > Configuration > General settings.

2. For Auto swap enabled, select On. Then select the desired target slot for Auto swap deployment slot, and select Save on the command bar.

3. Execute a code push to the source slot. Auto swap happens after a short time, and the update is reflected at your target slot's URL.

If you have any problems, see Troubleshoot swaps.

Specify custom warm-up

Some apps might require custom warm-up actions before the swap. The applicationInitialization configuration element in web.config lets you specify custom initialization actions. The swap operation waits for this custom warm-up to finish before swapping with the target slot. Here's a sample web.config fragment.

For more information on customizing the applicationInitialization element, see Most common deployment slot swap failures and how to fix them.

You can also customize the warm-up behavior with one or both of the following app settings:

• WEBSITE_SWAP_WARMUP_PING_PATH: The path to ping to warm up your site. Add this app setting by specifying a custom path that begins with a slash as the value. An example is /statuscheck. The default value is /.
• WEBSITE_SWAP_WARMUP_PING_STATUSES: Valid HTTP response codes for the warm-up operation. Add this app setting with a comma-separated list of HTTP codes. An example is 200,202 . If the returned status code isn't in the list, the warmup and swap operations are stopped. By default, all response codes are valid.

Note

The <applicationInitialization> configuration element is part of each app start-up, whereas the two warm-up behavior app settings apply only to slot swaps.

If you have any problems, see Troubleshoot swaps.

Monitor a swap

If the swap operation takes a long time to complete, you can get information on the swap operation in the activity log.

On your app's resource page in the portal, in the left pane, select Activity log.

A swap operation appears in the log query as Swap Web App Slots. You can expand it and select one of the suboperations or errors to see the details.

Route traffic

By default, all client requests to the app's production URL (http://<app_name>.azurewebsites.net) are routed to the production slot. You can route a portion of the traffic to another slot. This feature is useful if you need user feedback for a new update, but you're not ready to release it to production.

Route production traffic automatically

To route production traffic automatically:

1. Go to your app's resource page and select Deployment slots.

2. In the Traffic % column of the slot you want to route to, specify a percentage (between 0 and 100) to represent the amount of total traffic you want to route. Select Save.

After the setting is saved, the specified percentage of clients is randomly routed to the non-production slot.

After a client is automatically routed to a specific slot, it's 'pinned' to that slot for the life of that client session. On the client browser, you can see which slot your session is pinned to by looking at the x-ms-routing-name cookie in your HTTP headers. A request that's routed to the 'staging' slot has the cookie x-ms-routing-name=staging. A request that's routed to the production slot has the cookie x-ms-routing-name=self.

Note

Next to the Azure portal, you can also use the az webapp traffic-routing set command in the Azure CLI to set the routing percentages from CI/CD tools like DevOps pipelines or other automation systems.

Route production traffic manually

In addition to automatic traffic routing, App Service can route requests to a specific slot. This is useful when you want your users to be able to opt in to or opt out of your beta app. To route production traffic manually, you use the x-ms-routing-name query parameter.

To let users opt out of your beta app, for example, you can put this link on your webpage:

The string x-ms-routing-name=self specifies the production slot. After the client browser accesses the link, it's redirected to the production slot. Every subsequent request has the x-ms-routing-name=self cookie that pins the session to the production slot.

To let users opt in to your beta app, set the same query parameter to the name of the non-production slot. Here's an example:

By default, new slots are given a routing rule of 0%, shown in grey. When you explicitly set this value to 0% (shown in black text), your users can access the staging slot manually by using the x-ms-routing-name query parameter. But they won't be routed to the slot automatically because the routing percentage is set to 0. This is an advanced scenario where you can 'hide' your staging slot from the public while allowing internal teams to test changes on the slot.

Delete a slot

Search for and select your app. Select Deployment slots > <slot to delete> > Overview. The app type is shown as App Service (Slot) to remind you that you're viewing a deployment slot. Select Delete on the command bar.

Automate with PowerShell

Note

This article has been updated to use the Azure Az PowerShell module. The Az PowerShell module isthe recommended PowerShell module for interacting with Azure. To get started with the AzPowerShell module, see Install Azure PowerShell. To learn howto migrate to the Az PowerShell module, seeMigrate Azure PowerShell from AzureRM to Az.

Azure PowerShell is a module that provides cmdlets to manage Azure through Windows PowerShell, including support for managing deployment slots in Azure App Service.

For information on installing and configuring Azure PowerShell, and on authenticating Azure PowerShell with your Azure subscription, see How to install and configure Microsoft Azure PowerShell.

Create a web app

Create a slot

Initiate a swap with a preview (multi-phase swap), and apply destination slot configuration to the source slot

Cancel a pending swap (swap with review) and restore the source slot configuration

Swap deployment slots

How To Get Appointment Slots On Google Calendar

Monitor swap events in the activity log

Delete a slot

Automate with Resource Manager templates

Azure Resource Manager templates are declarative JSON files used to automate the deployment and configuration of Azure resources. To swap slots by using Resource Manager templates, you will set two properties on the Microsoft.Web/sites/slots and Microsoft.Web/sites resources:

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• buildVersion: this is a string property which represents the current version of the app deployed in the slot. For example: 'v1', '1.0.0.1', or '2019-09-20T11:53:25.2887393-07:00'.
• targetBuildVersion: this is a string property that specifies what buildVersion the slot should have. If the targetBuildVersion does not equal the current buildVersion, then this will trigger the swap operation by finding the slot which has the specified buildVersion.

Example Resource Manager template

The following Resource Manager template will update the buildVersion of the staging slot and set the targetBuildVersion on the production slot. This will swap the two slots. The template assumes you already have a webapp created with a slot named 'staging'.

This Resource Manager template is idempotent, meaning that it can be executed repeatedly and produce the same state of the slots. After the first execution, targetBuildVersion will match the current buildVersion, so a swap will not be triggered.

Automate with the CLI

For Azure CLI commands for deployment slots, see az webapp deployment slot.

Troubleshoot swaps

If any error occurs during a slot swap, it's logged in D:homeLogFileseventlog.xml. It's also logged in the application-specific error log.

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Here are some common swap errors:

• An HTTP request to the application root is timed. The swap operation waits for 90 seconds for each HTTP request, and retries up to 5 times. If all retries are timed out, the swap operation is stopped.

• Local cache initialization might fail when the app content exceeds the local disk quota specified for the local cache. For more information, see Local cache overview.

• During custom warm-up, the HTTP requests are made internally (without going through the external URL). They can fail with certain URL rewrite rules in Web.config. For example, rules for redirecting domain names or enforcing HTTPS can prevent warm-up requests from reaching the app code. To work around this issue, modify your rewrite rules by adding the following two conditions:

• Without a custom warm-up, the URL rewrite rules can still block HTTP requests. To work around this issue, modify your rewrite rules by adding the following condition:

• After slot swaps, the app may experience unexpected restarts. This is because after a swap, the hostname binding configuration goes out of sync, which by itself doesn't cause restarts. However, certain underlying storage events (such as storage volume failovers) may detect these discrepancies and force all worker processes to restart. To minimize these types of restarts, set the WEBSITE_ADD_SITENAME_BINDINGS_IN_APPHOST_CONFIG=1 app setting on all slots. However, this app setting does not work with Windows Communication Foundation (WCF) apps.

Next steps