# Rechenketten vs Number Divider

The clearest difference is price: Rechenketten at Free against Number Divider's $0.99. Rechenketten also leads on iOS requirement (12.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Rechenketten is free to download; Number Divider costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rechenketten ships an update fortnightly, Number Divider every 10 days. Both last shipped on October 27, 2026.

## The numbers

| Metric | Rechenketten | Number Divider |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Size | 28 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [IPN - Leibniz Institute for Science and Mathematics Education](https://appshunter.io/developer/1655344872) | [Christian Urff](https://appshunter.io/developer/415894463) |

## What reviewers say

### Rechenketten

[App page](https://appshunter.io/ios/app/rechenketten/id1590869977)

**In-app purchases:** none


### Number Divider

[App page](https://appshunter.io/ios/app/number-divider/id6737426816)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rechenketten free?

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

### Is Number Divider free?

Number Divider costs $0.99, with no in-app purchases.

### Do Rechenketten or Number Divider have ads?

Neither Rechenketten nor Number Divider shows ads.

### Which is updated more often, Rechenketten or Number Divider?

Rechenketten ships an update fortnightly, and Number Divider every 10 days. Most recently, Rechenketten was updated on October 27, 2026 and Number Divider on October 27, 2026.

---

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