# NÖ4Kids vs Mental Math Trainer

The clearest difference is in-app purchases: NÖ4Kids at none against Mental Math Trainer's 9. Mental Math Trainer's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mental Math Trainer sells 7 in-app purchases, starting at $2.99 per month. NÖ4Kids asks for nothing beyond the download.

NÖ4Kids ships an update every 2 months, Mental Math Trainer fortnightly. The most recent releases landed on September 22, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NÖ4Kids | Mental Math Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (228 ratings)](https://appshunter.io/ios/app/mental-math-trainer-puremath/id684305542/reviews)** |
| Number of ratings | — | **228** |
| Positive reviews | — | 57.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 50 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NO Medienzentrum](https://appshunter.io/developer/1844892868) | [Stoyan Hristov](https://appshunter.io/developer/584595816) |

## What reviewers say

### NÖ4Kids

[App page](https://appshunter.io/ios/app/no4kids/id652215877)

**In-app purchases:** none


### Mental Math Trainer

[App page](https://appshunter.io/ios/app/mental-math-trainer-puremath/id684305542)

Enhance your arithmetic abilities with this app. Practice addition, subtraction, multiplication, and division through engaging games and custom sessions. Track your progress and challenge friends to boost your mental math confidence and speed.

**Highlights:** Addition, subtraction, multiplication, division practice, Math Arcade mode with increasing difficulty, Customizable practice sessions, Memory training games (Find the Pairs), Progress tracking, Game Center integration for challenges

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $2.99 | per month |
| Unlimited Access | $2.99 | per 7 days |
| Unlimited Access | $3.99 | per month |
| Unlimited Access | $9.99 | per year |
| Unlimited Access | $12.99 | per year |
| Unlimited Access | $14.99 | per year |
| Unlock Everything | $17.99 | one-time |

**What reviewers like**

- 🧠 Brain training and mental sharpness
- 👍 Useful for math skills improvement
- 🚀 Fast and easy to use
- ✅ Good for daily practice
- 💡 Gamifies math learning

**What reviewers complain about**

- 💸 Most features are paid/locked
- 💰 Deceptive free version
- 😩 Repetitive questions/levels
- 🐌 Slow animations
- 📱 UI can be improved (keypad style)

**Reported bugs**

- App crashes or doesn't open
- Purchases not unlocking features
- In-app purchase issues
- Timer continues when paused
- Drag response not registering input

**Requested features**

- Option to choose keypad style
- More difficult levels
- Infinite or custom exercise mode
- Dark mode support
- Landscape mode support


## Frequently asked questions

### Is NÖ4Kids free?

NÖ4Kids is free to download, with no in-app purchases.

### Is Mental Math Trainer free?

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

### Do NÖ4Kids or Mental Math Trainer have ads?

Neither NÖ4Kids nor Mental Math Trainer shows ads.

### Which is updated more often, NÖ4Kids or Mental Math Trainer?

NÖ4Kids ships an update every 2 months, and Mental Math Trainer fortnightly. Most recently, NÖ4Kids was updated on September 22, 2026 and Mental Math Trainer on September 27, 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.*