Dynamic pin app lock

Lock your apps with state-of-the-art authentication algorithm.
Dynamic pin helps to secure your PIN from shoulder surfing and key loggers.

When you type the same PIN every time, there is a good chance your friends , electronic surveillance or others knowing it . How will you avoid that ?

Dynamic Pin changes the pin based on an expression you set in the application. After every use, the pin is destroyed and new pin is generated. Only the user, who know the expression can evaluate the new pin. Deducing the expressions from pin is not a trivial task .

You can set any expression like a+d , a*f , g-c ...

LOLLIPOP users have to manually enable app usage access for app lock via Settings--General--Security--App Usage Access.

***If your expression encounters divide by zero , the result is zero .

*Any expressions using operators +,-,*,/,%,^

*Minimum function MIN(x,y)

*Maximum function MAX(x,y)

*LOOK function
LOOK function has higher entropy without trading computation time or speed.
Type LOOK in Expression--PersonalExpression--PIN Formula--Practice & Confirm.
For LOOK function
https://dynamicpin.quora.com/LOOK-FUNCTION

*Further new functions will be added in due course.

mail me your feedback at vijrathina@gmail.com