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

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