How to use it
- Tap the keys or type the calculation on your keyboard.
- Press = (or Enter) to get the result; it is added to the history.
- Switch to Scientific for √, xʸ, sin, cos, tan, log and ln, in degrees or radians.
Questions and answers
How does the % key work?
It follows the usual calculator rules: 200 + 10% gives 220 and 200 − 10% gives 180; 50 × 10% gives 5. On its own, 10% is 0.1.
Does it follow the order of operations?
Yes: powers first, then × and ÷, then + and −, with parentheses changing the order. 2 + 3 × 4 = 14.
Degrees or radians?
Choose DEG or RAD in Scientific mode. School problems usually use degrees: sin(30) = 0.5 in DEG.
Can I use it full screen on my phone?
Yes. The keys fill the width of the screen and the history stays below, so you can scroll back to earlier results.