# MyPrinciple vs 计算工具箱

The clearest difference is in-app purchases: MyPrinciple at none against 计算工具箱's 2. 计算工具箱's advantage is update cadence (weekly vs fortnightly) and iOS requirement (9.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. 计算工具箱 sells 2 one-off in-app purchases. MyPrinciple asks for nothing beyond the download.

MyPrinciple ships an update fortnightly, 计算工具箱 weekly. The most recent releases landed on September 15, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | MyPrinciple | 计算工具箱 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 1 MB | 19 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [国材 苏](https://appshunter.io/developer/1227214050) | [MANTEN KAIHATSU Inc](https://appshunter.io/developer/1077623520) |

## What reviewers say

### MyPrinciple

[App page](https://appshunter.io/ios/app/myprinciple/id6444105946)

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

**In-app purchases:** none


### 计算工具箱

[App page](https://appshunter.io/ios/app/id6448837084)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解签 | $0.99 | one-time |
| 求签 | $0.99 | one-time |


## Frequently asked questions

### Is MyPrinciple free?

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

### Is 计算工具箱 free?

计算工具箱 is free to download, with in-app purchases available.

### Do MyPrinciple or 计算工具箱 have ads?

Neither MyPrinciple nor 计算工具箱 shows ads.

### Which is updated more often, MyPrinciple or 计算工具箱?

MyPrinciple ships an update fortnightly, and 计算工具箱 weekly. Most recently, MyPrinciple was updated on September 15, 2026 and 计算工具箱 on September 8, 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.*