A Scam!
I tried it, it doesnt work, i think it might require a computer to transfer photos.
I couldnt find a Privacy Policy or Terms of Service.
I wasted $1-2 just to see if it worked!
The way you know if theyre legit is by visiting the Developer Website.
No wonder he has no good reviews since 2013-2014.
funrunner1 about
Picture Safe - Hidden Photos, v2.9.2