AppImage is universal & auto-updates — chmod +x then run (needs FUSE, fuse2 on Arch). Native packages install into your system; update by re-downloading. Wayland screen-share & push-to-talk go through your desktop portal.
Native mobile app — chat, DMs, voice, and more. Installs and updates itself through Play.
Sideloaded the old APK? Uninstall it before installing from Play. Google signs the store build, so Android sees a different signature and won't update over a sideloaded copy. You'll sign in again; your account keeps everything else. One-time only.