Stims lets you select apps that should prevent your screen from turning off. When a "stimmed" app is active in the foreground, the screen stays on at full brightness. When you switch to a different app, the screen resumes normal sleep behavior.

Permissions

Stims requires Usage Access permission to detect which app is in the foreground so it can keep the phone awake.

On first launch the app will redirect you to the system settings screen. To enable it:

Go to Settings → Apps → Special app access → Usage access
Find Stims in the list and toggle it on
Return to the app

Without this permission the background service cannot detect foreground apps and the screen will not be kept awake.

Building from source

Requirements

Android Studio or the Android SDK command-line tools
JDK 8+

Steps

git clone https://github.com/acidburnmonkey/stims.git
cd stims
./gradlew assembleDebug

The APK will be output to:

app/build/outputs/apk/debug/stims-<version>.apk

For a release build:

./gradlew assembleRelease
# output: app/build/outputs/apk/release/stims-<version>.apk