# Lehrer Lämpel: Number Wheels — Can you solve the puzzle ?

> Can you solve the puzzle ? (iPhone/iPad app by Claus Zinn.)

- Source: https://appshunter.io/ios/app/lehrer-lampel-number-wheels/id959272416 (this page in markdown: same URL + `.md`)
- Developer: [Claus Zinn](https://appshunter.io/developer/889016868)
- Category: Education, Games
- Price: $0.99
- Age rating: 4+
- Requires: iOS 9.3 · 8 MB
- Languages: English, French, German, Italian
- Released: 2015-01-30
- Data updated: 2026-06-12
- User reviews in markdown: https://appshunter.io/ios/app/lehrer-lampel-number-wheels/id959272416/reviews.md

## What is Lehrer Lämpel?

The app implements the popular number wheels known from many school books; it supports primary school children to practise their skills in basic arithmetic: addition, subtraction, multiplication and division.

The learner is given a wheel of twenty segments, grouped into an inner and an outer ring around a pivot element.  Half of the segments are pre-filled with numbers. Now, learners need to compute the missing numbers, given the pivot element and the chosen operation (addition, or multiplication). 

The app offers a training and a challenge mode. In the training mode, pupils can ask Lehrer Lämpel for help at any time. In the challenge mode, a timer of one minute counts backwards (more time is allocated for more difficult tasks); segments have to filled out in the given order. Can you solve the wheel under a minute? -- For the challenge mode, there is a high score table maintaining the top 20 scores.

The app supports an unlimited number of randomised exercises, and three levels of difficulty.

The app supports English, French and German.

Available on the iPad, for iOS9 or later. 

The app is ad-free. No data is being collected. No web access is required. The high score is maintained locally.

Please consider leaving a review. This helps a lot. Thanks!


## Version history (last 5 releases)

### 1.4 — 2026-05-14

Support for Italian. Minor UI improvements.

### 1.3.1 — 2023-02-25

This is a maintenance update.

### 1.3 — 2019-11-15

- Design changes
- Improved feedback mechanism
- Improved highscore mechanism
- Minor bug fixes and minor improvements

### 1.2 — 2018-12-22

The new release contains minor bug fixes and GUI improvements.

### 1.1 — 2015-11-14

Now supports iOS9 (fixes iOS9 incompatibility issue)
Now supports retina displays

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## More apps by Claus Zinn

- [Lehrer Lämpel: Number Pyramids](https://appshunter.io/ios/app/lehrer-lampel-number-pyramids/id889016865)
- [Lehrer Lämpel: Subtraction](https://appshunter.io/ios/app/lehrer-lampel-subtraction/id890390632)
- [Lehrer Lämpel: Addition](https://appshunter.io/ios/app/lehrer-lampel-addition/id920522698)
- [Lehrer Lämpel: Fractions](https://appshunter.io/ios/app/lehrer-lampel-fractions/id932955952)
- [Lehrer Lämpel: Digit Squares](https://appshunter.io/ios/app/lehrer-lampel-digit-squares/id948600535)

All apps by Claus Zinn: https://appshunter.io/developer/889016868

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-12.*