# Sorobaco — Soroban mental math trainer

> Soroban mental math trainer (iPhone/iPad app by Mercurio Solutions.)

- Source: https://appshunter.io/ios/app/sorobaco/id6760806680 (this page in markdown: same URL + `.md`)
- Developer: [Mercurio Solutions](https://appshunter.io/developer/1857594853)
- Category: Education, Games
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 1 MB
- Languages: American English, Italian, European Spanish
- Released: 2026-04-23
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/sorobaco/id6760806680/reviews.md

## What is Sorobaco?

Sorobaco is a mental arithmetic training system built around the Soroban. Not a game. Not a tutorial. A tool that observes how you think under pressure.

SESSIONS

Each session unfolds across three progressive phases.

Phase 1: Familiarisation. The full equation is visible: 25 + 8 = 33. Learn the gestures without cognitive pressure.
Phase 2: Verification. Only the question: 25 + 8 = ?. Calculate the result and set it on the Soroban.
Phase 3: Challenge. Only the operation: + 8. Hold the current value in mind and apply it, the first step toward pure mental arithmetic (Anzan). Each time you lose track and reset the Soroban, a rewind is counted.

Validation is silent. When the soroban matches the target, the session continues. No buttons. No confirmation.

ADAPTIVE PRESSURE

There is no visible timer. The system watches your hesitations and recoveries and responds. Flow in: pressure steadies. Hesitation: pressure builds. Clean sequence: a moment of ease. The time does not punish. It responds.

COGNITIVE STATES

After each session, Sorobaco reflects your performance through three states:

Load: slowdowns, over-conscious attention, long hesitations.
Flow: continuous action, stable rhythm, comfortable pace.
Automatism: rapid, implicit decisions, minimal hesitation.

No scores. No stars. An honest mirror.

SESSIONS END NATURALLY

When your hesitation pattern sustains instability long enough, the session closes on its own. No countdown. No announcement. The flow simply stops.

PRIVACY

No data collected. Your practice history stays in your own iCloud. No ads. No subscriptions. One optional in-app tip to support independent development.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 2 releases)

### 2.0.0 — 2026-08-19

Sorobaco is now on Mac, and your practice history follows you through iCloud.
The cognitive profile no longer reports a session too short to measure as if it were perfect flow.
New: your three cognitive states drawn over time, so you can see whether automatism is growing.
New: a short read on what anzan is, and how far Sorobaco takes you toward it.

### 1.0.0 — 2026-04-23

No release notes.

## Apps similar to Sorobaco

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [AI Debate Master](https://appshunter.io/ios/app/ai-debate-master/id6744669316) | — | Free | Education |
| [Hadal: Learn Somali](https://appshunter.io/ios/app/hadal-learn-somali/id6761196657) | 4.8 (12) | Free | Education |
| [Flash Mental Math (Anzan)](https://appshunter.io/ios/app/flash-mental-math-anzan/id6749636736) | 5.0 (3) | Free | Education |
| [Soroban: Abacus & Mental Math](https://appshunter.io/ios/app/soroban-abacus-and-mental-math/id6743341778) | 4.5 (19) | Free | Education |
| [MiSoroban: Japanese Abacus](https://appshunter.io/ios/app/misoroban-japanese-abacus/id6484265986) | — | Free | Education |
| [abacus shapes](https://appshunter.io/ios/app/abacus-shapes/id1370412661) | — | Free | Education |

## More apps by Mercurio Solutions

- [Stync](https://appshunter.io/ios/app/stync/id6755956346)
- [Tap or Die!](https://appshunter.io/ios/app/tap-or-die/id6755956463)
- [Motion Flow](https://appshunter.io/ios/app/motion-flow/id6758455371)
- [Love2D Launcher](https://appshunter.io/ios/app/love2d-launcher/id6759799457)
- [SPARC Load](https://appshunter.io/ios/app/sparc-load/id6760991148)

All apps by Mercurio Solutions: https://appshunter.io/developer/1857594853

## Related topics

[soroban training](https://appshunter.io/ios/topics/soroban-training)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*