Did you come here looking for: A calculator, a spirit level, or just want to know someone's age?
If so, then you've found the app you needed. There are no in-app purchases, and the features aren't locked or limited.

========Calculator Functions===========
> Convert dates to days, hours, minutes, seconds, microseconds, nanoseconds, or milliseconds.
> Simple tool similar to a spirit level for flat surfaces.
> Scientific calculator with Casio-like functions (For common sense. The language, numbers, or abbreviations on the buttons use alphanumeric characters).
------- "SHIFT" toggles the calculator functions
------- "MEM" shows the last calculations performed.
--------------- "FUN" Redisplays the calculator functions.
--------------- Click the expression or result in the results list to add it to the calculator's expressions field.
------- Functions: Square Root, Power, Logarithms, Tangents, Cosine, Mixed Calculations, Fractions and Mixed Fractions, etc.