I share my experience to about app lock.
Im saving my personal details, my documents, my pictures, but the app lock not work properly im change the password but it is not work,
The most important my data is lost in this app, its automatically delete, how? I don't know, , the reason is app lock, because it not work properly and my data is lost.
Im very hurt to lost my data, my favourite moments , my pics and most important my documents,
Disadvantage is of these app.
No work properly
No gives a security
Waste the space
Hang the mobile