Free calculator app for the iPhone

1. No ads and super fast startup speed
2. Calculation history
3. Visual input

4. VoiceOver
5. Backspace key
6. Easy to use with one hand
7. Show or hide scientific functions

8. Keyboard sounds (19 sounds)
9. Keyboard colors (24 colors)
10. Keyboard vibration

11. Adjustable number of decimal places
12. Thousands separator
13. Scientific calculator

calculator with pi
calculator with exponents
calculator with square root
calculator with negative
calculator with log
calculator with trig
calculator with angles and radians
calculator with e
calculator with factorial
calculator with nth root
calculator with brackets

[email protected]