# 海钉约课 vs i长春

The clearest difference is update cadence: i长春 at weekly against 海钉约课's monthly. 海钉约课's advantage is iOS requirement (11.0 vs 15.0). 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.

海钉约课 ships an update monthly, i长春 weekly. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 海钉约课 | i长春 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 84 MB | 50 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [萱 王](https://appshunter.io/developer/1502971306) | [长春市数据产业发展有限公司](https://appshunter.io/developer/1836858262) |

## What reviewers say

### 海钉约课

[App page](https://appshunter.io/ios/app/id1504867376)

**Features:** macOS Compatibility

**In-app purchases:** none


### i长春

[App page](https://appshunter.io/ios/app/i/id6752376054)

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

**In-app purchases:** none


## Frequently asked questions

### Is 海钉约课 free?

海钉约课 is free to download, with no in-app purchases.

### Is i长春 free?

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

### Do 海钉约课 or i长春 have ads?

Neither 海钉约课 nor i长春 shows ads.

### Which is updated more often, 海钉约课 or i长春?

海钉约课 ships an update monthly, and i长春 weekly. Most recently, 海钉约课 was updated on September 16, 2026 and i长春 on September 13, 2026.

---

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