# Audio Maths vs Kopfrechnen Trainer

The clearest difference is in-app purchases: Kopfrechnen Trainer at none against Audio Maths's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Audio Maths sells 2 in-app purchases, starting at $3.99 per month. Kopfrechnen Trainer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 15, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Audio Maths | Kopfrechnen Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 11 MB | 92 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Felix Desiderato](https://appshunter.io/developer/1742514874) | [Alban Nelaj](https://appshunter.io/developer/1894156643) |

## What reviewers say

### Audio Maths

[App page](https://appshunter.io/ios/app/audio-maths/id6754295502)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $3.99 | per month |
| Lifetime Access | $5.99 | 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 Audio Maths free?

Audio Maths 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 Audio Maths or Kopfrechnen Trainer have ads?

Neither Audio Maths nor Kopfrechnen Trainer shows ads.

### Which is updated more often, Audio Maths or Kopfrechnen Trainer?

Audio Maths ships an update every 2 weeks, and Kopfrechnen Trainer every 2 weeks. Most recently, Audio Maths was updated on September 15, 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.*