# Brain Training Calculation Master vs K3學中文 (寫字認字)

The clearest difference is price: Brain Training Calculation Master at Free against K3學中文 (寫字認字)'s $7.99. Brain Training Calculation Master also leads on update cadence (every 3 months vs every 9 months) and iOS requirement (7.0 vs 9.0). K3學中文 (寫字認字)'s advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Brain Training Calculation Master is free to download; K3學中文 (寫字認字) costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Brain Training Calculation Master ships an update every 3 months, K3學中文 (寫字認字) every 9 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Brain Training Calculation Master | K3學中文 (寫字認字) |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-training-calculation-master/id702231884/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Ad-supported | — |
| Size | 16 MB | 362 MB |
| Requires iOS | **7.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Iwatani](https://appshunter.io/developer/702231887) | [Yiu Ying Ching](https://appshunter.io/developer/1667170345) |

## What reviewers say

### Brain Training Calculation Master

[App page](https://appshunter.io/ios/app/brain-training-calculation-master/id702231884)

Enhance your mathematical skills with engaging practice sessions. This app offers customizable drills for addition, subtraction, and multiplication, with options for digit count and question quantity. It also features unique numeral systems to further challenge your brain.

**Highlights:** Addition, subtraction, and multiplication practice, Selectable digit count (1-4 digits), Customizable question quantity (10, 30, 50, 100), Adjustable button arrangement, Multiple numeral systems (standard, Chinese, Japanese, English)

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

**In-app purchases:** none


### K3學中文 (寫字認字)

[App page](https://appshunter.io/ios/app/k3/id1669891510)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Brain Training Calculation Master free?

Brain Training Calculation Master is free to download, with no in-app purchases.

### Is K3學中文 (寫字認字) free?

K3學中文 (寫字認字) costs $7.99, with no in-app purchases.

### Do Brain Training Calculation Master or K3學中文 (寫字認字) have ads?

Brain Training Calculation Master shows ads; K3學中文 (寫字認字) does not.

### Which is updated more often, Brain Training Calculation Master or K3學中文 (寫字認字)?

Brain Training Calculation Master ships an update every 3 months, and K3學中文 (寫字認字) every 9 months. Most recently, Brain Training Calculation Master was updated on November 1, 2026 and K3學中文 (寫字認字) on October 27, 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.*