Solve your calculations without wasting paper. This powerful, yet lightweight calculator will replace your scratchpad.

Really cool and promising ideaIt reminds me of school and doing calculations on paper at home. Really cool and much better than those old one-line calculators. So, consider a full keyboard support and a more powerful calculation engine. And keep implementing such promising stuff.

Sven R. (USA)

Better than any calculator AppBeats most calculator apps because it's basically like a blackboard that answers back.

Arch (USA)

Rechner supports most functions and constants similar to TI Syntax.

To see a complete overview of the supported functionality click:

We are already developing the next Version of Rechner.

- Multipage Calculations
- Calculation sharing (Excel)
- Calculation sharing (Bitmap)
- Improved docked view
- more powerful calculation engine
- Wolfram alpha integration (In App Purchase)