# Robo Run Memory vs Mental Calculation & Abacus

The clearest difference is ads: Robo Run Memory at none against Mental Calculation & Abacus's shown. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Robo Run Memory | Mental Calculation & Abacus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mental-calculation-and-abacus/id1582407909/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | — | Ad-supported |
| Size | 30 MB | 143 MB |
| Requires iOS | 12.2 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chris Clements](https://appshunter.io/developer/1023107489) | [Park Jisang](https://appshunter.io/developer/995438886) |

## What reviewers say

### Robo Run Memory

[App page](https://appshunter.io/ios/app/robo-run-memory/id1273765882)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mental Calculation & Abacus

[App page](https://appshunter.io/ios/app/mental-calculation-and-abacus/id1582407909)

Engage in a fun and educational game designed to enhance mental calculation skills. Learn to use an abacus with an easy-to-follow tutorial and practice with diverse question types.

**Highlights:** Mental calculation practice, Abacus learning tutorial, Variety of practice questions, Suitable for all ages

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

**In-app purchases:** none


## Frequently asked questions

### Is Robo Run Memory free?

Robo Run Memory is free to download, with no in-app purchases.

### Is Mental Calculation & Abacus free?

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

### Do Robo Run Memory or Mental Calculation & Abacus have ads?

Mental Calculation & Abacus shows ads; Robo Run Memory does not.

### Which is updated more often, Robo Run Memory or Mental Calculation & Abacus?

Robo Run Memory ships an update every 6 months, and Mental Calculation & Abacus every 6 months. Most recently, Robo Run Memory was updated on October 29, 2026 and Mental Calculation & Abacus on October 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.*