# Erfolgreich Lesen vs Math Queen / Math King

The clearest difference is in-app purchases: Math Queen / Math King at none against Erfolgreich Lesen's 1. Erfolgreich Lesen's advantage is update cadence (every 10 months vs every 30 months) and iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Erfolgreich Lesen sells 1 one-off in-app purchase. Math Queen / Math King asks for nothing beyond the download.

Erfolgreich Lesen ships an update every 10 months, Math Queen / Math King every 30 months. The most recent releases landed on October 25, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Erfolgreich Lesen | Math Queen / Math King |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 30 months |
| Size | 235 MB | 11 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [IntegraTools GmbH](https://appshunter.io/developer/618103816) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### Erfolgreich Lesen

[App page](https://appshunter.io/ios/app/erfolgreich-lesen/id1441943996)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gesamter Wortschatz | $44.99 | one-time |


### Math Queen / Math King

[App page](https://appshunter.io/ios/app/math-queen-math-king/id6477328464)

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

**In-app purchases:** none


## Frequently asked questions

### Is Erfolgreich Lesen free?

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

### Is Math Queen / Math King free?

Math Queen / Math King is free to download, with no in-app purchases.

### Do Erfolgreich Lesen or Math Queen / Math King have ads?

Neither Erfolgreich Lesen nor Math Queen / Math King shows ads.

### Which is updated more often, Erfolgreich Lesen or Math Queen / Math King?

Erfolgreich Lesen ships an update every 10 months, and Math Queen / Math King every 30 months. Most recently, Erfolgreich Lesen was updated on October 25, 2026 and Math Queen / Math King on November 4, 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.*