# Mental Math vs RekenSter

The clearest difference is in-app purchases: RekenSter at none against Mental Math's 10. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Mental Math sells 10 in-app purchases, starting at $4.99 per 7 days. RekenSter asks for nothing beyond the download.

Mental Math ships an update every 3 weeks, RekenSter every 10 days. The most recent releases landed on September 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Mental Math | RekenSter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/mental-math-mathee/id6502719157/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 0 MB |
| Requires iOS | 17.1 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Lebedev](https://appshunter.io/developer/636486462) | [Inter Pipe Tool BV](https://appshunter.io/developer/6814825884) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-mathee/id6502719157)

Enhance your arithmetic abilities with daily math challenges. This app offers over 30 difficulty levels, personalized exercises, and progress tracking to help users of all ages improve their calculation speed and accuracy.

**Highlights:** 30+ difficulty levels, Personalized exercises, Progress tracking, Quick sessions, User-friendly design, Engaging and interactive

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $5.99 | per month |
| Premium Plus | $11.99 | per 3 months |
| Premium Plus | $14.99 | per year |
| Premium Plus | $17.49 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $39.99 | per year |
| Premium Plus | $39.99 | one-time |


### RekenSter

[App page](https://appshunter.io/ios/app/rekenster/id6814825882)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math free?

Mental Math is free to download, with in-app purchases available.

### Is RekenSter free?

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

### Do Mental Math or RekenSter have ads?

Neither Mental Math nor RekenSter shows ads.

### Which is updated more often, Mental Math or RekenSter?

Mental Math ships an update every 3 weeks, and RekenSter every 10 days. Most recently, Mental Math was updated on September 22, 2026 and RekenSter on October 29, 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.*