Используйте приложение APKPure
Историческую версию SMS Lock можно получить на Android
Блокировка SMS-... сохранить вашу конфиденциальность
A new app for locking SMSs on your mobile with a password you choose, you can export chosen SMSs to an XML file on your mobile storage, then you can when you want import them again to the saved box. You will not loose your SMSs.
Languages supported: All languages that the device supports.