# Mental Math Gym vs Sums

The clearest difference is update cadence: Sums at every 4 days against Mental Math Gym's every 2 months. Sums also leads on iOS requirement (16.4 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Mental Math Gym sells 1 one-off in-app purchase and Sums sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mental Math Gym ships an update every 2 months, Sums every 4 days. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Mental Math Gym | Sums |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 5 MB | 61 MB |
| Requires iOS | 26.2 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JTM](https://appshunter.io/developer/491099581) | [Gleb Matsko](https://appshunter.io/developer/6772153044) |

## What reviewers say

### Mental Math Gym

[App page](https://appshunter.io/ios/app/mental-math-gym/id6758856983)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $14.99 | one-time |


### Sums

[App page](https://appshunter.io/ios/app/sums-mental-math-practice/id6794615479)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Mental Math Gym free?

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

### Is Sums free?

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

### Do Mental Math Gym or Sums have ads?

Neither Mental Math Gym nor Sums shows ads.

### Which is updated more often, Mental Math Gym or Sums?

Mental Math Gym ships an update every 2 months, and Sums every 4 days. Most recently, Mental Math Gym was updated on October 25, 2026 and Sums on October 10, 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.*