TScalc
Scientific calculator for iPhone
About TScalc
TScalc is a scientific calculator rebuilt for iPhone from a calculator originally made for Windows CE (Pocket PC) in 2001. Type an expression in natural order and calculate.
- sin, cos, tan, log, ln, √, powers, roots, eˣ, π, 1/x, ×10ⁿ (scientific notation)
- Switch the angle unit between DEG and RAD
- Past calculations stay on screen; tap one to bring it back and edit it
- Use the previous answer with the Ans key
How to use
- Enter an expression with the keys and press = to calculate. While you type, the result appears as soon as the expression can be calculated.
- After an answer, press + − × ÷ and so on to keep calculating from it.
- Tap a past calculation above the expression to bring it back and edit it.
- Tap the expression to move the cursor there. You can also use ‹ ›.
- Tap the answer to copy it.
- Switch the angle unit between degrees and radians with DEG / RAD.
- The “?” button at the top right opens in-app help; the clock button opens the history list.
Keys
| Key | What it does |
|---|---|
| xʸ | Power (2 xʸ 10 = 1,024) |
| ʸ√x | Root (3 ʸ√x 27 = 3) |
| ×10ⁿ | Scientific notation (1.5 ×10ⁿ 3 = 1,500) |
| 1/x | Reciprocal |
| Ans | Previous answer |
| ⌫ | Delete one character |
| AC | Clear the expression |
FAQ
Does 0.1+0.2 show 0.3?
Yes. Floating-point noise is removed by rounding results to 15 significant digits.
I got an error
Division by zero, square roots of negative numbers, log(0), tan(90°) and similar cannot be calculated, so the app shows the reason. A missing closing parenthesis at the end of the expression is closed automatically.
How do I clear the history?
Open the history list with the clock button and tap “Clear All”. Deleting the app also removes it.
Which languages are supported?
Japanese and English. The app is shown in Japanese when the device language is Japanese, and in English otherwise.
Requirements
iPhone with iOS 17 or later