Stable channel
Stable 31.94 is the build most living room setups should run. It balances YouTube API compatibility with smooth playback on Nvidia Shield, Fire TV Stick 4K, and Chromecast with Google TV.
Download stable from the main APK page when you want the safest daily driver.
Beta channel
Beta tags arrive first when YouTube changes break playback. Testers install beta on a spare stick or box, confirm the fix, and switch back to stable once a new stable release ships.
Grab beta from the beta download page.
SmartTubeNext naming
SmartTubeNext is the official project name maintained by Yuriy Liskov. Users still search smart tube next apk and smarttube beta, but the installer package remains the same SmartTube app on your launcher.
When to install beta
Install beta
Stable playback fails after a YouTube outage and you want to test an early fix before the next stable release.
Stay on stable
Your Firestick is the only TV in the house and you need reliable nightly viewing.