# SoroTouch Mental Calculation vs KOOV®

The clearest difference is rating: KOOV® at 4.8 against SoroTouch Mental Calculation's 2.3. KOOV® also leads on monetization model (free vs subscription). SoroTouch Mental Calculation's advantage is ratings volume (39 vs 6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

KOOV® holds the better App Store score, 4.8 against 2.3. That said, the two scores are not equally well evidenced: SoroTouch Mental Calculation has 39 ratings behind it against 6, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SoroTouch Mental Calculation | KOOV® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (39 ratings)](https://appshunter.io/ios/app/sorotouch-mental-calculation/id1153930190/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/koov/id1188974713/reviews)** |
| Number of ratings | **39** | 6 |
| Positive reviews | 32.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Subscription | **Free** |
| Size | 460 MB | 272 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [SoroTouch Co., Ltd.](https://appshunter.io/developer/927820962) | [SONY GLOBAL EDUCATION, INC.](https://appshunter.io/developer/994421997) |

## What reviewers say

### SoroTouch Mental Calculation

[App page](https://appshunter.io/ios/app/sorotouch-mental-calculation/id1153930190)

This app teaches abacus method mental calculation using patented imaging technology. Designed for children aged 5-8, it offers games and rankings to enhance math skills through daily practice. It requires membership registration via a web portal.

**Highlights:** Abacus method mental calculation, Imaging skills training, Daily missions and games, Progress tracking and rankings, Visible and Invisible modes, Audio and rhythm-based learning

**In-app purchases:** none


### KOOV®

[App page](https://appshunter.io/ios/app/koov/id1188974713)

This educational app teaches coding and robotics through interactive lessons and hands-on robot building. Users can follow pre-written code, earn badges for completing courses, and create their own unique robot designs.

**Highlights:** 3D building guide, Visual programming with coding blocks, Robot Recipes with pre-written code, Learning Course with badges, Free Production for custom robots, Collection of activities and creations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SoroTouch Mental Calculation free?

SoroTouch Mental Calculation is free to download, with no in-app purchases.

### Is KOOV® free?

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

### Which has better reviews, SoroTouch Mental Calculation or KOOV®?

KOOV® is rated higher. SoroTouch Mental Calculation averages 2.3 out of 5 from 39 ratings, while KOOV® averages 4.8 from 6 ratings.

### Do SoroTouch Mental Calculation or KOOV® have ads?

Neither SoroTouch Mental Calculation nor KOOV® shows ads.

### Which is updated more often, SoroTouch Mental Calculation or KOOV®?

SoroTouch Mental Calculation ships an update every 2 months, and KOOV® every 2 months. Most recently, SoroTouch Mental Calculation was updated on September 24, 2026 and KOOV® on September 8, 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.*