# Simple Soroban (Abacus) vs Robi Lab

The clearest difference is in-app purchases: Simple Soroban (Abacus) at none against Robi Lab's 2. Robi Lab's advantage is iOS requirement (15.0 vs 18.3). On price, ads and device support there is nothing between them.

Both are free to download. Robi Lab sells 2 in-app purchases, starting at $3.99 per month. Simple Soroban (Abacus) asks for nothing beyond the download.

## The numbers

| Metric | Simple Soroban (Abacus) | Robi Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/simple-soroban-abacus/id6787463185/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Monetization | Free | — |
| Size | 3 MB | 22 MB |
| Requires iOS | 18.3 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bruno Takahashi Carvalhas de Oliveira](https://appshunter.io/developer/1860732734) | [LEVANTNET CONSULTING S.A.S.](https://appshunter.io/developer/6818317360) |

## What reviewers say

### Simple Soroban (Abacus)

[App page](https://appshunter.io/ios/app/simple-soroban-abacus/id6787463185)

Learn and practice Japanese abacus calculations with interactive tutorials and multiple modes. Customize your abacus experience and improve mental math skills with this completely free educational tool.

**Highlights:** Interactive tutorials for arithmetic, Freeform, Relax, Challenge, and Anzan modes, Configurable 7 or 9-column soroban, Multiple color themes, No ads or in-app purchases, Mental calculation training

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

**In-app purchases:** none


### Robi Lab

[App page](https://appshunter.io/ios/app/robi-lab/id6818317358)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Family Plan monthly | $3.99 | per month |
| Family Plan yearly | $29.99 | per year |


## Frequently asked questions

### Is Simple Soroban (Abacus) free?

Simple Soroban (Abacus) is free to download, with no in-app purchases.

### Is Robi Lab free?

Robi Lab is free to download, with in-app purchases available.

### Do Simple Soroban (Abacus) or Robi Lab have ads?

Neither Simple Soroban (Abacus) nor Robi Lab shows ads.

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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.*