# 仪表宝典 vs Control System Calc

The clearest difference is in-app purchases: Control System Calc at none against 仪表宝典's 3. 仪表宝典's advantage is update cadence (every 3 days vs every 5 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 仪表宝典 sells 3 one-off in-app purchases. Control System Calc asks for nothing beyond the download.

仪表宝典 ships an update every 3 days, Control System Calc every 5 weeks. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 仪表宝典 | Control System Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 5 weeks |
| Size | 85 MB | 10 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [仪表宝典(新疆)网络科技有限公司](https://appshunter.io/developer/1883782098) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### 仪表宝典

[App page](https://appshunter.io/ios/app/id6760313721)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $0.99 | one-time |
| 年度会员 | $5.99 | one-time |
| 永久会员 | $29.99 | one-time |


### Control System Calc

[App page](https://appshunter.io/ios/app/control-system-calc/id6791956580)

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

**In-app purchases:** none


## Frequently asked questions

### Is 仪表宝典 free?

仪表宝典 is free to download, with in-app purchases available.

### Is Control System Calc free?

Control System Calc is free to download, with no in-app purchases.

### Do 仪表宝典 or Control System Calc have ads?

Both 仪表宝典 and Control System Calc show ads.

### Which is updated more often, 仪表宝典 or Control System Calc?

仪表宝典 ships an update every 3 days, and Control System Calc every 5 weeks. Most recently, 仪表宝典 was updated on October 28, 2026 and Control System Calc on October 29, 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.*