Android: Per-app PIN locks are nothing new.
However, they could be more secure.
You then use those values to make a four-digit PIN, which changes periodically.
Dynamic Pin| Google Play Store viaXDA
Dynamic Pin Locks Apps with a Complex, Changing PIN
Android: Per-app PIN locks are nothing new. However, they could be more secure. Dynamic Pin takes a page out of TimePIN's book and allows you to creat
