Use the following tips provided by the developer on Play Store page, in case you have issues with the application.
- Be careful when deleting unlocked media files. If you do that, you will lost media files. Steps to recover it : Safe Gallery Reinstall > Setting > Lock Media Recovery
- App Hide : If "it is not installed application" or is not running in the launcher, because it is checked "App Hide Mode" at Set up. Please use dial "#789" in your phone and press call.
- When not execute calling to dial : Run Widget(Safe Gallery 1x1) > Enter Quick Running number > Run app
- Settings of app > Recovering media file : it can recover disappeared or invisible locked media files.