# Soroban Drill vs Flash Mental Math

The clearest difference is in-app purchases: Flash Mental Math at none against Soroban Drill's 1. Flash Mental Math also leads on rating (4.7 vs 4.4). Soroban Drill's advantage is ads (none vs shown) and ratings volume (64 vs 18). On price, update cadence and device support there is nothing between them.

Both are free to download. Soroban Drill sells 1 one-off in-app purchase. Flash Mental Math asks for nothing beyond the download.

Flash Mental Math holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 64 and 18 respectively.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 15, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Soroban Drill | Flash Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (64 ratings)](https://appshunter.io/ios/app/soroban-drill/id1348246229/reviews) | **[4.7 (18 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews)** |
| Number of ratings | **64** | 18 |
| Positive reviews | 64.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 30 MB | 14 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Junichiro Komizo](https://appshunter.io/developer/325507919) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### Soroban Drill

[App page](https://appshunter.io/ios/app/soroban-drill/id1348246229)

Practice Japanese abacus calculations with this app. It offers exercises for addition, subtraction, sums, multiplication, and division. Advanced features like multiplication, division, and mock exams are available via in-app purchase.

**Highlights:** Arithmetic drills, Multiplication practice, Division practice, Mock soroban exams, Addition and subtraction exercises

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全ての機能をアンロック | $3.99 | one-time |


### 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 Soroban Drill free?

Soroban Drill is free to download, with in-app purchases available.

### Is Flash Mental Math free?

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

### Which has better reviews, Soroban Drill or Flash Mental Math?

Flash Mental Math is rated higher. Soroban Drill averages 4.4 out of 5 from 64 ratings, while Flash Mental Math averages 4.7 from 18 ratings.

### Do Soroban Drill or Flash Mental Math have ads?

Flash Mental Math shows ads; Soroban Drill does not.

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

Soroban Drill ships an update every 3 months, and Flash Mental Math every 3 months. Most recently, Soroban Drill was updated on October 15, 2026 and Flash Mental Math on September 29, 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.*