# 后湾 vs achei

The clearest difference is in-app purchases: achei at none against 后湾's 3. 后湾's advantage is update cadence (every 2 days vs every 2 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. 后湾 sells 3 in-app purchases, starting at $2.99 per 7 days. achei asks for nothing beyond the download.

后湾 ships an update every 2 days, achei every 2 weeks. The most recent releases landed on October 25, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 后湾 | achei |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 110 MB | 17 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Jiangyu Technologies](https://appshunter.io/developer/1657976686) | [WooSync (Shanghai) Technology Co., Ltd](https://appshunter.io/developer/1766014898) |

## What reviewers say

### 后湾

[App page](https://appshunter.io/ios/app/id1663608485)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1周 | $2.99 | per 7 days |
| 1个月 | $7.99 | per month |
| 3个月 | $19.99 | per 3 months |


### achei

[App page](https://appshunter.io/ios/app/achei/id6670375901)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 后湾 free?

后湾 is free to download, with in-app purchases available.

### Is achei free?

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

### Do 后湾 or achei have ads?

Neither 后湾 nor achei shows ads.

### Which is updated more often, 后湾 or achei?

后湾 ships an update every 2 days, and achei every 2 weeks. Most recently, 后湾 was updated on October 25, 2026 and achei on November 4, 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.*