# BDL vs 尾巴信标

The clearest difference is iOS requirement: BDL at 13.0 against 尾巴信标's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

BDL ships an update every 2 weeks, 尾巴信标 fortnightly. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | BDL | 尾巴信标 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 51 MB | 97 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Suzhou Boundless Medical Technology Co.,Ltd](https://appshunter.io/developer/1728812703) | [Qingdao ZhongRuiYun Digit Technology Co., Ltd.](https://appshunter.io/developer/1001428629) |

## What reviewers say

### BDL

[App page](https://appshunter.io/ios/app/bdl-sh/id6477274035)

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

**In-app purchases:** none


### 尾巴信标

[App page](https://appshunter.io/ios/app/id6747565388)

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

**In-app purchases:** none


## Frequently asked questions

### Is BDL free?

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

### Is 尾巴信标 free?

尾巴信标 is free to download, with no in-app purchases.

### Do BDL or 尾巴信标 have ads?

Neither BDL nor 尾巴信标 shows ads.

### Which is updated more often, BDL or 尾巴信标?

BDL ships an update every 2 weeks, and 尾巴信标 fortnightly. Most recently, BDL was updated on October 27, 2026 and 尾巴信标 on October 30, 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.*