# i交院 vs 暖宫腰带

The clearest difference is update cadence: i交院 at every 3 weeks against 暖宫腰带's every 7 months. 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.

i交院 ships an update every 3 weeks, 暖宫腰带 every 7 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | i交院 | 暖宫腰带 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Size | 94 MB | 40 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [上海树维信息科技有限公司](https://appshunter.io/developer/994850925) | [易客创新(泉州)智能科技有限公司](https://appshunter.io/developer/1683294855) |

## What reviewers say

### i交院

[App page](https://appshunter.io/ios/app/i/id1595531684)

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

**In-app purchases:** none


### 暖宫腰带

[App page](https://appshunter.io/ios/app/id6462087228)

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

**In-app purchases:** none


## Frequently asked questions

### Is i交院 free?

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

### Is 暖宫腰带 free?

暖宫腰带 is free to download, with no in-app purchases.

### Do i交院 or 暖宫腰带 have ads?

Neither i交院 nor 暖宫腰带 shows ads.

### Which is updated more often, i交院 or 暖宫腰带?

i交院 ships an update every 3 weeks, and 暖宫腰带 every 7 months. Most recently, i交院 was updated on October 30, 2026 and 暖宫腰带 on October 25, 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.*