Id give 5 stars, except ...

If you are going to take it from free to pay-only you should COMMUNICATE with users before letting them LOSE ALL THEIR DATA.
The app and all the data just DISSAPPEARED - POOF!! with no warning.
How do you recover the data???

App is tell works pretty well. But the app is lacking different color profiles. The default dark blue against black menus are extremely hard to see. PLEASE fix this for those of us with less than perfect vision.

Also you have to join Facebook to get support ??? Thats not support for a paid app.

Whompus12 about Lock Photos & Video.s Vault - Passcode Protect Your Secret Photo Album & Secure Private Picture.s Folders, v4.3