Laifen vs 小当易换
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Laifen
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.
- Connect to Laifen electric toothbrush
- Set personal usage preferences
- Adjust hardware device parameters
- Create custom toothbrush modes
- Achieve optimal oral health
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Laifen App is the official application of Laifen Technology. Through this software, you can connect to the Laifen electric toothbrush, set personal usage preferences, and adjust hardware device parameters. By customizing parameters, you can preset a toothbrush mode specific to you, assisting you in effortlessly achieving optimal oral health.
小当易换
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【我们的优势】 邀约估价：优质活动广而告之，助你获客无忧 旧机估价：算法快速更新，估价精准专业 实时竞价：实时报价实时沟通，价格透明真实 海量活动：全年补贴狂撒，旧机高价换新
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Laifen | 小当易换 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (78 ratings) — better | — |
| Positive reviews | 28.6% of reviews | — |
| Number of ratings | 78 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 160 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Shuye Innovation Technology Co., Ltd. | 重庆市当换网络科技有限公司 |
Bugs and requests
Laifen
Reported bugs
17 issues- 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
Show 12 moreShow fewer
- Buttons present but unlabeled/non-functional
- App disconnects from toothbrush after profile creation
- Cannot add new toothbrushes to account
- Phantom toothbrush devices appear in account
- Cannot disconnect or delete toothbrush entries
- User profile information not editable
- Text display issues with non-English languages
- App freezes after recent updates
- Toothbrush won't turn on after charging
- Firmware calibration process fails
- App shows connected status but device unresponsive
- Phone number format validation rejects valid numbers
Requested features
14 requests- Apple Health integration and sync
- Battery percentage display
- Dark mode option
- Brushing timer in app
- Real-time brushing feedback and notifications
Show 9 moreShow fewer
- Brushing statistics and performance tracking
- Reward points system for achievements
- Pressure detection alerts
- Support for more than 3 toothbrush devices
- Device identification display
- Troubleshooting and user guide within app
- Brushing quality metrics (similar to Oral-B)
- Automation features for brushing reminders
- Toothbrush model selection in setup
小当易换
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Laifen
No in-app purchases
小当易换
No in-app purchases
