iPad Screenshots


Supports both the Austrian method as well as the decomposition method for multi-column subtraction.

This educational app supports primary school children (usually from 3rd grade) to practise their multi-column subtraction skills.

The two main subtraction methods, namely, the Equal Additions Method (aka the Austrian Method), and the Decomposition Method are supported.

Easy drag & drop of numbers to the blackboard.

Immediate feedback option where incorrect steps are immediately marked red and where correct steps are immediately marked green.

Pupils can ask Lehrer Lämpel for help at any time. Help first removes an erroneously learner step; if there are no errors, a single step is performed towards the solution.

All teacher steps towards the solution are followed-up with a step explanation as well.

Various degrees of difficulty guided by the number of digits the two numbers can have, and whether borrowing operations are required.

Supports self-defined subtraction tasks and there is a work-sheet, and randomised exercises.

Supports English, French and German.

Available on the iPad, for iOS9 or later.

The app is ad-free. No data is being collected. Please consider leaving a review. This helps a lot. Thanks!

What’s New

Version 1.7

- The worksheet now keeps track of the number of help requests the user issued to solve a task.
- Minor design improvements.

App Privacy

The developer, Claus Zinn, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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