# Entdeckerwelten vs Mental Math Practice

The clearest difference is in-app purchases: Entdeckerwelten at none against Mental Math Practice's 9. Entdeckerwelten also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.0). Mental Math Practice's advantage is update cadence (every 4 weeks vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Mental Math Practice sells 9 in-app purchases, starting at $2.99 per 7 days. Entdeckerwelten asks for nothing beyond the download.

Entdeckerwelten ships an update every 5 months, Mental Math Practice every 4 weeks. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Entdeckerwelten | Mental Math Practice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mental-math-practice-1x1/id1580519521/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 81 MB | 29 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EUROKEY Software GmbH](https://appshunter.io/developer/885417836) | [Florian Schweizer](https://appshunter.io/developer/1142213239) |

## What reviewers say

### Entdeckerwelten

[App page](https://appshunter.io/ios/app/entdeckerwelten/id1486296116)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mental Math Practice

[App page](https://appshunter.io/ios/app/mental-math-practice-1x1/id1580519521)

Sharpen your mental math skills with quick, focused practice sessions. Covers addition, subtraction, multiplication, and division across various number ranges and difficulty levels. Includes a home screen widget for hourly math drills.

**Highlights:** Addition, subtraction, multiplication, division, Multiple difficulty levels, Customizable number ranges, Distraction-free interface, Home screen widget, Progress tracking

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Weekly) | $2.99 | per 7 days |
| Pro (Yearly) | $19.99 | per year |
| Division Operator | $0.99 | one-time |
| Numbers up to 1000 | $0.99 | one-time |
| Sine Operator | $0.99 | one-time |
| Cosine Operator | $0.99 | one-time |
| Logarithm Operator | $0.99 | one-time |
| Percent Operator | $0.99 | one-time |
| All Operators | $2.99 | one-time |


## Frequently asked questions

### Is Entdeckerwelten free?

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

### Is Mental Math Practice free?

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

### Do Entdeckerwelten or Mental Math Practice have ads?

Neither Entdeckerwelten nor Mental Math Practice shows ads.

### Which is updated more often, Entdeckerwelten or Mental Math Practice?

Entdeckerwelten ships an update every 5 months, and Mental Math Practice every 4 weeks. Most recently, Entdeckerwelten was updated on September 9, 2026 and Mental Math Practice on September 22, 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.*