# 商业易筋经 vs Contract Lab

The clearest difference is update cadence: Contract Lab at every 4 days against 商业易筋经's every 3 weeks. 商业易筋经's advantage is iOS requirement (10 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

商业易筋经 ships an update every 3 weeks, Contract Lab every 4 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 商业易筋经 | Contract Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 38 MB | 80 MB |
| Requires iOS | **10** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Facing the Sea Technology Co., Ltd](https://appshunter.io/developer/1748996459) | [奇 林](https://appshunter.io/developer/1896582109) |

## What reviewers say

### 商业易筋经

[App page](https://appshunter.io/ios/app/id6503337733)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contract Lab

[App page](https://appshunter.io/ios/app/contract-lab/id6768622992)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is 商业易筋经 free?

商业易筋经 is free to download, with no in-app purchases.

### Is Contract Lab free?

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

### Do 商业易筋经 or Contract Lab have ads?

Neither 商业易筋经 nor Contract Lab shows ads.

### Which is updated more often, 商业易筋经 or Contract Lab?

商业易筋经 ships an update every 3 weeks, and Contract Lab every 4 days. Most recently, 商业易筋经 was updated on October 27, 2026 and Contract Lab on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*