# Flash mental calculation vs Abacutor

The clearest difference is rating: Flash mental calculation at 5.0 against Abacutor's 3.8. Abacutor's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Flash mental calculation sells 1 one-off in-app purchase. Abacutor asks for nothing beyond the download.

Flash mental calculation holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Abacutor has 29 ratings behind it against 2, so its average is the more settled of the two.

Flash mental calculation ships an update every 5 months, Abacutor every 2 months. The most recent releases landed on August 19, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Flash mental calculation | Abacutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523/reviews)** | [3.8 (29 ratings)](https://appshunter.io/ios/app/abacutor/id1469765610/reviews) |
| Number of ratings | 2 | **29** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 25 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kenji kiuchi](https://appshunter.io/developer/553473005) | [Soroban League North America Corp](https://appshunter.io/developer/1896639256) |

## What reviewers say

### Flash mental calculation

[App page](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523)

Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.

**Highlights:** Practice flash mental arithmetic, Review calculation process, Rechallenge mistaken problems, Save past calculation logs, Log history saved after purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove AD & All function Release. | $9.99 | one-time |


### Abacutor

[App page](https://appshunter.io/ios/app/abacutor/id1469765610)

This app serves as a digital abacus for students to practice mental math and abacus skills. Teachers can assign homework and monitor student progress in real-time, facilitating faster learning.

**Highlights:** Digital abacus simulation, Mental math (Anzan) training, Homework assignment and management, Real-time student progress monitoring, Abacus and Soroban method, Classwork and homework tool

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

**In-app purchases:** none


## Frequently asked questions

### Is Flash mental calculation free?

Flash mental calculation is free to download, with in-app purchases available.

### Is Abacutor free?

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

### Which has better reviews, Flash mental calculation or Abacutor?

Flash mental calculation is rated higher. Flash mental calculation averages 5.0 out of 5 from 2 ratings, while Abacutor averages 3.8 from 29 ratings.

### Do Flash mental calculation or Abacutor have ads?

Flash mental calculation shows ads; Abacutor does not.

### Which is updated more often, Flash mental calculation or Abacutor?

Flash mental calculation ships an update every 5 months, and Abacutor every 2 months. Most recently, Flash mental calculation was updated on August 19, 2026 and Abacutor on September 18, 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.*