# Sorobaco vs Abacus

The clearest difference is in-app purchases: Abacus at none against Sorobaco's 1. Abacus also leads on update cadence (every 10 days vs every 3 months). Sorobaco's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sorobaco sells 1 one-off in-app purchase. Abacus asks for nothing beyond the download.

Sorobaco ships an update every 3 months, Abacus every 10 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Sorobaco | Abacus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 1 MB | 19 MB |
| Requires iOS | 26.2 | **26** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [MERCURIO SAS DI INFANTE LUCA & C.](https://appshunter.io/developer/1857594853) | [Aleksandr Govorukhin](https://appshunter.io/developer/1729392672) |

## What reviewers say

### Sorobaco

[App page](https://appshunter.io/ios/app/sorobaco-soroban-mental-math/id6760806680)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Sorobaco | $1.99 | one-time |


### Abacus

[App page](https://appshunter.io/ios/app/abacus-mental-arithmetic/id6819154039)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sorobaco free?

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

### Is Abacus free?

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

### Do Sorobaco or Abacus have ads?

Abacus shows ads; Sorobaco does not.

### Which is updated more often, Sorobaco or Abacus?

Sorobaco ships an update every 3 months, and Abacus every 10 days. Most recently, Sorobaco was updated on November 5, 2026 and Abacus on November 6, 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.*