As far as I know, if Stardew Valley stutters on mobile after the 1.6 update, try restarting your device and closing other apps to free resources. Lowering graphics settings (like frame rate or resolution) may help, and if you’re on Android, clearing the game’s cache (not data) can improve performance. Check for updates or patches, as new updates may have bugs. If issues persist, reinstalling the game could help just back up your save files first. I think these quick steps should make your game run smoother.
Thank You
Mike Taku