On the child's Samsung (One UI):
- Settings → Battery and device care → Battery → Power saving Off.
- Battery → Background usage limits → Never sleeping apps → add Safe Lagoon. Turn Put unused apps to sleep off if it keeps catching Safe Lagoon.
- Battery and device care → Memory → Excluded apps → add Safe Lagoon.
- Recents → Safe Lagoon → keep it (lock if your One UI version has a lock).
- Apps → Safe Lagoon → Battery → Unrestricted.
To overlay-block Settings (kids turning us off): Developer options → Allow screen overlays on Settings. See System settings on Samsung.
