# Abacus Exercise vs Flash Mental Math

The clearest difference is update cadence: Abacus Exercise at every 3 weeks against Flash Mental Math's every 3 months. Abacus Exercise also leads on ratings volume (60 vs 18) and iOS requirement (11.0 vs 15.6). Flash Mental Math's advantage is rating (4.7 vs 4.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flash Mental Math holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 60 and 18 respectively.

Abacus Exercise ships an update every 3 weeks, Flash Mental Math every 3 months. The most recent releases landed on September 21, 2026 and August 3, 2026 respectively.

## The numbers

| Metric | Abacus Exercise | Flash Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (60 ratings)](https://appshunter.io/ios/app/abacus-exercise/id1523833529/reviews) | **[4.7 (18 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews)** |
| Number of ratings | **60** | 18 |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | Ad-supported |
| Size | 90 MB | 14 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### Abacus Exercise

[App page](https://appshunter.io/ios/app/abacus-exercise/id1523833529)

Practice abacus calculations with a customizable digital tool. Adjust bead colors, sounds, and layout for a personalized learning experience. Challenge yourself with addition, subtraction, multiplication, and division exercises.

**Highlights:** Customizable abacus layout, Adjustable bead size and position, Up to 15-digit support, Customizable bead colors and sounds, Addition, subtraction, multiplication, division practice, Level-based challenges

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

**In-app purchases:** none


### Flash Mental Math

[App page](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841)

Practice mental arithmetic with various difficulty levels and custom modes. This app serves as a brain training tool to enhance calculation skills.

**Highlights:** Mental arithmetic practice, Easy, normal, and difficult modes, Customizable modes, Brain training, Calculation skill improvement

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

**In-app purchases:** none


## Frequently asked questions

### Is Abacus Exercise free?

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

### Is Flash Mental Math free?

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

### Which has better reviews, Abacus Exercise or Flash Mental Math?

Flash Mental Math is rated higher. Abacus Exercise averages 4.5 out of 5 from 60 ratings, while Flash Mental Math averages 4.7 from 18 ratings.

### Do Abacus Exercise or Flash Mental Math have ads?

Both Abacus Exercise and Flash Mental Math show ads.

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

Abacus Exercise ships an update every 3 weeks, and Flash Mental Math every 3 months. Most recently, Abacus Exercise was updated on September 21, 2026 and Flash Mental Math on August 3, 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.*