# Rechentrainer vs Oti

The clearest difference is update cadence: Rechentrainer at every 2 months against Oti's every 5 months. Rechentrainer also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rechentrainer ships an update every 2 months, Oti every 5 months. The most recent releases landed on September 23, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Rechentrainer | Oti |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 14.2 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nicolai Kummer](https://appshunter.io/developer/1497635656) | [TTS Group Limited](https://appshunter.io/developer/500131642) |

## What reviewers say

### Rechentrainer

[App page](https://appshunter.io/ios/app/rechentrainer/id1497635657)

This app offers personalized math practice for all ages, covering addition, subtraction, multiplication, and division. It features customizable difficulty levels, motivational rewards, and progress tracking to make learning enjoyable and effective.

**Highlights:** Personalized arithmetic practice, Customizable difficulty levels, Motivational reward system, Learning progress tracking, Suitable for all ages

**Features:** macOS Compatibility

**In-app purchases:** none


### Oti

[App page](https://appshunter.io/ios/app/oti-bot/id1605747632)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rechentrainer free?

Rechentrainer is free to download, with no in-app purchases.

### Is Oti free?

Oti is free to download, with no in-app purchases.

### Do Rechentrainer or Oti have ads?

Neither Rechentrainer nor Oti shows ads.

### Which is updated more often, Rechentrainer or Oti?

Rechentrainer ships an update every 2 months, and Oti every 5 months. Most recently, Rechentrainer was updated on September 23, 2026 and Oti on September 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*