# MathApex vs Kopfrechnen Trainer

The clearest difference is in-app purchases: Kopfrechnen Trainer at none against MathApex's 1. MathApex's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MathApex sells 1 one-off in-app purchase. Kopfrechnen Trainer asks for nothing beyond the download.

MathApex ships an update every 3 weeks, Kopfrechnen Trainer every 2 weeks. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | MathApex | Kopfrechnen Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 93 MB | 92 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Umit Sevim](https://appshunter.io/developer/939217054) | [Alban Nelaj](https://appshunter.io/developer/1894156643) |

## What reviewers say

### MathApex

[App page](https://appshunter.io/ios/app/mathapex-math-learning/id6753774905)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathApex Pro | $4.99 | one-time |


### Kopfrechnen Trainer

[App page](https://appshunter.io/ios/app/kopfrechnen-trainer/id6764520128)

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

**In-app purchases:** none


## Frequently asked questions

### Is MathApex free?

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

### Is Kopfrechnen Trainer free?

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

### Do MathApex or Kopfrechnen Trainer have ads?

Neither MathApex nor Kopfrechnen Trainer shows ads.

### Which is updated more often, MathApex or Kopfrechnen Trainer?

MathApex ships an update every 3 weeks, and Kopfrechnen Trainer every 2 weeks. Most recently, MathApex was updated on September 22, 2026 and Kopfrechnen Trainer on September 14, 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.*