Laifen vs StraightApp+
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.
StraightApp+
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This application works with your STRAIGHT+ device. Kodgem Straight+ is a small personal posture coach that discreetly attaches to the upper part of your back and provides you with instant posture feedback. When you slouch, your Kodgem Straight will gently vibrate to remind you to return to your upright position. The Kodgem Straight Posture Corrector comes with a real-time posture tracking iOS App, StraightApp+. With StraightApp+, you can track your progress, customize your device settings as you wish, and do regular exercises to strengthen your back and chest muscles. Thanks to advanced AI support, your StraightApp+ offers two different modes: Casual Mode: Ideal for tracking your posture throughout the day. No continuous vibration, only when necessary, all-day tracking. Use for daily life and walks. Training Mode: Ideal for improving your posture. This mode will help you actively train your posture. Use it when you are sitting or stationary. In the app, you will find: - Step-by-step tutorial to help set up your device - Your own avatar that shows your posture in real-time and helps develop your posture awareness - Personalized daily goals based on performance - A profile and statistics screen to help you track progress and continue to improve - Many customizable settings for your device For more information: https://kodgemstraight.com For help: help@kodgemstraight.com
Screenshots
Verdict
The clearest difference is iOS requirement: Laifen at 15.0 against StraightApp+'s 17.6. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.
| Parameter | Laifen | StraightApp+ |
|---|---|---|
| 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 | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 160 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Shuye Innovation Technology Co., Ltd. | Kodgem |
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
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- 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
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- 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
StraightApp+
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Laifen
No in-app purchases
StraightApp+
No in-app purchases
