# BDL vs 电牙

The clearest difference is in-app purchases: BDL at none against 电牙's 3. BDL also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 电牙 sells 3 one-off in-app purchases. BDL asks for nothing beyond the download.

BDL ships an update every 2 weeks, 电牙 weekly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BDL | 电牙 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 51 MB | 45 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Suzhou Boundless Medical Technology Co.,Ltd](https://appshunter.io/developer/1728812703) | [Change the World (Shenzhen) Artificial Intelligence Technology Co., Ltd](https://appshunter.io/developer/1824623538) |

## What reviewers say

### BDL

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

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

**In-app purchases:** none


### 电牙

[App page](https://appshunter.io/ios/app/id6748213733)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10小时转写时长包 | $3.99 | one-time |
| 30小时转写时长包 | $9.99 | one-time |
| 100小时转写时长包 | $29.99 | one-time |


## Frequently asked questions

### Is BDL free?

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

### Is 电牙 free?

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

### Do BDL or 电牙 have ads?

Neither BDL nor 电牙 shows ads.

### Which is updated more often, BDL or 电牙?

BDL ships an update every 2 weeks, and 电牙 weekly. Most recently, BDL was updated on October 27, 2026 and 电牙 on October 28, 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.*