# Flash Mental Math vs Abacus Simulator

The clearest difference is in-app purchases: Flash Mental Math at none against Abacus Simulator's 10. Abacus Simulator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Abacus Simulator sells 10 one-off in-app purchases. Flash Mental Math asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Flash Mental Math against 4.6 for Abacus Simulator. Both are backed by a comparable volume of ratings — 18 and 31 respectively.

Flash Mental Math ships an update every 3 months, Abacus Simulator every 3 weeks. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Flash Mental Math | Abacus Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (18 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews)** | [4.6 (31 ratings)](https://appshunter.io/ios/app/abacus-simulator/id1558355099/reviews) |
| Number of ratings | 18 | **31** |
| Positive reviews | — | 72.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 14 MB | 41 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) | [Nicholas Ang](https://appshunter.io/developer/1558355101) |

## What reviewers say

### 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


### Abacus Simulator

[App page](https://appshunter.io/ios/app/abacus-simulator/id1558355099)

Enhance your mental math abilities with interactive abacus exercises. This app offers guided lessons and daily drills to improve calculation speed, focus, and accuracy. Customize your abacus for a fun and engaging learning experience.

**Highlights:** Interactive abacus exercises, Guided step-by-step lessons, Daily skill-sharpening exercises, Focus, speed, and accuracy improvement, Customizable abacus

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Beads | $1.99 | one-time |
| Coconut Beads | $1.99 | one-time |
| Lemon Beads | $1.99 | one-time |
| Mushroom Beads | $1.99 | one-time |
| Penguin Beads | $1.99 | one-time |
| Flower Beads | $1.99 | one-time |
| Orange Beads | $1.99 | one-time |
| Snail Beads | $1.99 | one-time |
| Snowman Beads | $1.99 | one-time |
| Watermelon Beads | $1.99 | one-time |


## Frequently asked questions

### Is Flash Mental Math free?

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

### Is Abacus Simulator free?

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

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

Flash Mental Math is rated higher. Flash Mental Math averages 4.7 out of 5 from 18 ratings, while Abacus Simulator averages 4.6 from 31 ratings.

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

Flash Mental Math shows ads; Abacus Simulator does not.

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

Flash Mental Math ships an update every 3 months, and Abacus Simulator every 3 weeks. Most recently, Flash Mental Math was updated on September 29, 2026 and Abacus Simulator on September 30, 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.*