# Flash vs Mental Math

The clearest difference is in-app purchases: Flash at none against Mental Math's 3. Mental Math's advantage is update cadence (every 8 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mental Math sells 3 in-app purchases, starting at $2.99 per month. Flash asks for nothing beyond the download.

Flash ships an update every 3 months, Mental Math every 8 days. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Flash | Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (4 ratings)](https://appshunter.io/ios/app/mental-math-soroban-abacus/id6476421167/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 17.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 56 MB |
| Requires iOS | **17.0** | 17.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [yeeun seo](https://appshunter.io/developer/1634215603) | [TAKAYUKI HASHIMOTO](https://appshunter.io/developer/1689527181) |

## What reviewers say

### Flash

[App page](https://appshunter.io/ios/app/flash-mental-math/id1634215601)

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

**In-app purchases:** none


### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-soroban-abacus/id6476421167)

Sharpen your mental math skills with this engaging app focused on addition. Customize card numbers and timing intervals for a personalized learning experience. Track your progress with visually stimulating graphics, suitable for all ages.

**Highlights:** Customizable card numbers, Adjustable timing intervals, Focus on addition, Progress tracking, Engaging visuals, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間プラン | $2.99 | per month |
| 年間プラン | $19.99 | per year |
| Lifetime Premium | $39.99 | one-time |


## Frequently asked questions

### Is Flash free?

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

### Is Mental Math free?

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

### Do Flash or Mental Math have ads?

Both Flash and Mental Math show ads.

### Which is updated more often, Flash or Mental Math?

Flash ships an update every 3 months, and Mental Math every 8 days. Most recently, Flash was updated on October 5, 2026 and Mental Math on October 9, 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.*