# Mental Math vs おかね脳トレ

The clearest difference is in-app purchases: Mental Math at none against おかね脳トレ's 1. Mental Math also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. おかね脳トレ sells 1 one-off in-app purchase. Mental Math asks for nothing beyond the download.

Mental Math ships an update every 6 days, おかね脳トレ every 9 days. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Mental Math | おかね脳トレ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4 ratings)](https://appshunter.io/ios/app/mental-math-boost-cal-skills/id1572014520/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 6 days** | Every 9 days |
| Monetization | Ad-supported | — |
| Size | 67 MB | 40 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yudai Kitano](https://appshunter.io/developer/1529380991) | [KODAI MURAKAMI](https://appshunter.io/developer/6783250126) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-boost-cal-skills/id1572014520)

Train your calculation skills with this app by solving math problems against the clock. Customize the time limit and number of questions for a personalized challenge. Review your results to track progress and improve your math abilities.

**Highlights:** Solve math problems against a time limit, Customize time limit and number of problems, Review calculation results, Simple and comfortable user interface, Gaming experience for spare time

**In-app purchases:** none


### おかね脳トレ

[App page](https://appshunter.io/ios/app/5/id6799604734)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro（広告なし・全機能） | $3.99 | one-time |


## Frequently asked questions

### Is Mental Math free?

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

### Is おかね脳トレ free?

おかね脳トレ is free to download, with in-app purchases available.

### Do Mental Math or おかね脳トレ have ads?

Both Mental Math and おかね脳トレ show ads.

### Which is updated more often, Mental Math or おかね脳トレ?

Mental Math ships an update every 6 days, and おかね脳トレ every 9 days. Most recently, Mental Math was updated on October 15, 2026 and おかね脳トレ on October 25, 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.*