Scientific Calculator+ HD Free is the best and the most convenient scientific calculator in AppStore.

Why?

Apart from the usual features such as root, power, trigonometric functions, logarithms it also offers:
- factorial (!)
- double factorial (!!)
- drawing graphs
- four memory blocks
- inserting constants
- making notes
- full history
- random number generator
- and many more...

Scientific Calculator+ HD Free is made by math/physics students. Our objective is to make it as convenient as traditional calculator, which we used at university.

Just try it, you won't regret it :)