# Laifen vs 小当易换

The clearest difference is update cadence: 小当易换 at weekly against Laifen's every 3 weeks. 小当易换 also leads on iOS requirement (13.0 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.

Laifen ships an update every 3 weeks, 小当易换 weekly. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Laifen | 小当易换 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.4 (78 ratings)](https://appshunter.io/ios/app/laifen/id6463205325/reviews)** | — |
| Number of ratings | **78** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 160 MB | 77 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Shuye Innovation Technology Co., Ltd.](https://appshunter.io/developer/1704141324) | [重庆市当换网络科技有限公司](https://appshunter.io/developer/1676031799) |

## What reviewers say

### Laifen

[App page](https://appshunter.io/ios/app/laifen/id6463205325)

Connect to your smart electric toothbrush to personalize your brushing experience. Set usage preferences and adjust device parameters to create custom modes for optimal oral health.

**Highlights:** Connect to Laifen electric toothbrush, Set personal usage preferences, Adjust hardware device parameters, Create custom toothbrush modes, Achieve optimal oral health

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

**In-app purchases:** none

**What reviewers like**

- ⚡ Quick device pairing and connection
- 🎛️ Customizable toothbrush settings (strength, frequency, oscillations)
- 🔄 Real-time setting synchronization with device
- 🦷 High-quality toothbrush hardware and materials
- 📦 Excellent packaging and product design

**What reviewers complain about**

- 🐛 Verification code not sent via SMS or email
- 🔐 Mandatory login requirement for app access
- 📱 Missing text/labels in app interface
- 🔌 App connectivity issues with toothbrush
- 💾 Data persistence problems (settings not saved)

**Reported bugs**

- Verification code never arrives via phone or email
- Get Code button permanently greyed out
- Server returns incorrect data errors
- Request timeout errors during account creation
- App shows blank screens with no text labels

**Requested features**

- Apple Health integration and sync
- Battery percentage display
- Dark mode option
- Brushing timer in app
- Real-time brushing feedback and notifications


### 小当易换

[App page](https://appshunter.io/ios/app/id6474163985)

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

**In-app purchases:** none


## Frequently asked questions

### Is Laifen free?

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

### Is 小当易换 free?

小当易换 is free to download, with no in-app purchases.

### Do Laifen or 小当易换 have ads?

Neither Laifen nor 小当易换 shows ads.

### Which is updated more often, Laifen or 小当易换?

Laifen ships an update every 3 weeks, and 小当易换 weekly. Most recently, Laifen was updated on September 25, 2026 and 小当易换 on September 10, 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.*