# Abacus vs Flash Mental Math

The clearest difference is rating: Flash Mental Math at 4.7 against Abacus's 2.6. Flash Mental Math also leads on review sentiment (100% vs 67%) and update cadence (every 3 months vs every 44 months). Abacus's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, in-app purchases and device support 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 2.6. Both are backed by a comparable volume of ratings — 10 and 19 respectively. Written reviews point the same way: 67% of Abacus's written reviews are positive against 100% of Flash Mental Math's.

Abacus ships an update every 44 months, Flash Mental Math every 3 months. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Abacus | Flash Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (10 ratings)](https://appshunter.io/ios/app/abacus-simple-soroban-abacus/id852935077/reviews) | **[4.7 (19 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews)** |
| Number of ratings | 10 | **19** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 44 months | **Every 3 months** |
| Monetization | **Free** | Ad-supported |
| Size | 5 MB | 14 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Switt Kongdachalert](https://appshunter.io/developer/741342887) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### Abacus

[App page](https://appshunter.io/ios/app/abacus-simple-soroban-abacus/id852935077)

This app provides a digital soroban abacus for learning and practicing calculations. It visually displays the numerical value of each column as beads are moved, aiding in mental math development. Designed for beginners, it offers a simple interface to explore the ancient calculating tool.

**Highlights:** Digital soroban abacus simulation, Visual representation of column values, Supports mental math practice, Simple swipe and shake controls, Beginner-friendly interface

**Features:** macOS Compatibility

**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 free?

Abacus 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 or Flash Mental Math?

Flash Mental Math is rated higher. Abacus averages 2.6 out of 5 from 10 ratings, while Flash Mental Math averages 4.7 from 19 ratings.

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

Flash Mental Math shows ads; Abacus does not.

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

Abacus ships an update every 44 months, and Flash Mental Math every 3 months. Most recently, Abacus was updated on October 6, 2026 and Flash Mental Math 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.*