CRT Screen-Off Animation on Android 13–16+ Without Root: AGSL and 120 Hz

⚡ The gist in 5 seconds - The Typongtv/CRT-Screen-Off-Animation project recreates the CyanogenMod-style screen off/sleep animation for Android 13–16+. - It works without root — no superuser privileges required, rendering is done via AGSL with hardware acceleration on the GPU. - 120 Hz support is claimed; the minimum version target is Android 13. ### 🔍 What was found On GitHub, in the Typongtv/CRT-Screen-Off-Animation repository, a screen sleep animation has been published that reproduces the authentic CRT (cathode-ray tube) effect from CyanogenMod. According to the project description, it is compatible with Android 13–16+, and installation and operation are "100% Rootless" — that is, without unlocking or superuser privileges. The technical implementation is built on AGSL (Android Graphics Shading Language) with GPU hardware acceleration and is designed for 120 Hz displays — rendering goes through the shader path rather than a regular View animation. That's why the lower system bound is set at Android 13: AGSL shaders are available starting from that version, which defines the 13–16+ range. ### 💡 Why it matters The "collapsing CRT" effect is one of the most recognizable touches of custom ROMs from the Android 4.x era, and until now it could only be brought back via root modules or third-party overlays. Here, the same visual is promised without superuser privileges and with true GPU rendering via AGSL, which removes the main barrier — tampering with the system. For owners of devices on recent Android versions, this is the simplest way to restore the iconic screen-off animation without hacking.