# The Unstoppables vs Mental Math Trainer

The clearest difference is in-app purchases: The Unstoppables at none against Mental Math Trainer's 2. Mental Math Trainer's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mental Math Trainer sells 2 in-app purchases, starting at $1.99 per month. The Unstoppables asks for nothing beyond the download.

The Unstoppables ships an update every 3 months, Mental Math Trainer every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | The Unstoppables | Mental Math Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (18 ratings)](https://appshunter.io/ios/app/the-unstoppables/id968991365/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 234 MB | 31 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Schweizerische Stiftung fuer das cerebral gelaehmte Kind](https://appshunter.io/developer/968991244) | [Nadzeya Yashchuk](https://appshunter.io/developer/1835856077) |

## What reviewers say

### The Unstoppables

[App page](https://appshunter.io/ios/app/the-unstoppables/id968991365)

Join four friends on a mission to rescue their kidnapped guide dog. Navigate obstacles and utilize teamwork to overcome challenges in this adventure game. Explore diverse locations, from a house to a spooky forest hut, in a quest to save Tofu.

**Highlights:** Rescue mission, Teamwork challenges, Obstacle navigation, Diverse locations, Story-driven adventure

**Features:** macOS Compatibility

**In-app purchases:** none


### Mental Math Trainer

[App page](https://appshunter.io/ios/app/mental-math-trainer-sprint/id6763547636)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Stats. No Ads. Monthly. | $1.99 | per month |
| Full Stats. All Year. | $9.99 | per year |


## Frequently asked questions

### Is The Unstoppables free?

The Unstoppables 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 The Unstoppables or Mental Math Trainer have ads?

Neither The Unstoppables nor Mental Math Trainer shows ads.

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

The Unstoppables ships an update every 3 months, and Mental Math Trainer every 3 weeks. Most recently, The Unstoppables was updated on November 1, 2026 and Mental Math Trainer on October 31, 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.*