# Sessions in AWS Device Farm
<a name="sessions"></a>

You can use Device Farm to perform interactive testing of Android and iOS apps through remote access sessions. This includes both manual interaction in a web browser and running Appium tests from a local client against the remote device. Developers can reproduce issues with their app or with their Appium tests on a specific device to isolate and resolve problems.

**Topics**
+ [Supported devices for remote access](#session-devices-supported)
+ [Session files retention](#session-files-retention)
+ [Instrumenting apps](#session-instrumenting)
+ [Re-signing apps in sessions](#session-resigning-apps)
+ [Obfuscated apps in sessions](#session-obfuscated-apps)

## Supported devices for remote access
<a name="session-devices-supported"></a>

Device Farm provides support for a number of unique, popular Android and iOS devices. The list of available devices grows as new devices enter the market. The Device Farm console displays the current list of Android and iOS devices available for remote access. For more information, see [Device support in AWS Device FarmDevices](devices.md).

## Session files retention
<a name="session-files-retention"></a>

Device Farm stores your apps and files for 30 days and then deletes them from its system. You can delete your files at any time, however.

Device Farm stores your session logs and captured video for 400 days and then deletes them from its system.

## Instrumenting apps
<a name="session-instrumenting"></a>

You do not need to instrument your apps or provide Device Farm with the source code for your apps. Android and iOS apps can be submitted unmodified. 

## Re-signing apps in sessions
<a name="session-resigning-apps"></a>

Device Farm re-signs Android and iOS apps. This can break functionality that depends on the app's signature. For example, the Google Maps API for Android depends on your app's signature. App re-signing can also trigger antipiracy or antitamper detection from products such as DexGuard for Android devices. 

## Obfuscated apps in sessions
<a name="session-obfuscated-apps"></a>

For Android apps, if the app is obfuscated, you can still test it with Device Farm if you use ProGuard. However, if you use DexGuard with antipiracy measures, Device Farm cannot re-sign the app.