# Bigbrain Soroban vs OHO Kingdom

The clearest difference is update cadence: Bigbrain Soroban at every 4 days against OHO Kingdom's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Bigbrain Soroban sells 1 one-off in-app purchase and OHO Kingdom sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Bigbrain Soroban ships an update every 4 days, OHO Kingdom every 5 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Bigbrain Soroban | OHO Kingdom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/bigbrain-soroban/id1563917231/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 weeks |
| Monetization | Free | — |
| Size | 234 MB | 83 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TAM TRI LUC TRAINING JOINT STOCK COMPANY](https://appshunter.io/developer/1448811815) | [Tho Trong Nguyen](https://appshunter.io/developer/1093690555) |

## What reviewers say

### Bigbrain Soroban

[App page](https://appshunter.io/ios/app/bigbrain-soroban/id1563917231)

This educational app helps children develop super-fast mental calculation skills and comprehensive brain thinking. Designed by leading experts, it uses lessons to foster a love for math, improve concentration, and enhance creativity and memory.

**Highlights:** Develop super-fast mental calculation, Enhance comprehensive brain thinking, Improve concentration and focus, Stimulate and balance brain hemisphere development, Boost creativity and memory, Interactive lessons with visual aids

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Phiên bản đầy đủ | $89.99 | one-time |


### OHO Kingdom

[App page](https://appshunter.io/ios/app/oho-kingdom/id6449923116)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Course 299.000đ | $9.99 | one-time |


## Frequently asked questions

### Is Bigbrain Soroban free?

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

### Is OHO Kingdom free?

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

### Do Bigbrain Soroban or OHO Kingdom have ads?

Neither Bigbrain Soroban nor OHO Kingdom shows ads.

### Which is updated more often, Bigbrain Soroban or OHO Kingdom?

Bigbrain Soroban ships an update every 4 days, and OHO Kingdom every 5 weeks. Most recently, Bigbrain Soroban was updated on November 3, 2026 and OHO Kingdom on November 7, 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.*