Subscribe for the latest smartwatch app reviews and recommendations
Lefun Health - Smart Watch App
Score Overview
4.1
Overall Rating
4.1
App Store
4.1
Google Play
10M+Google Play Downloads
Lefun Health
Shenzhen TJD Information Technology Co. LTD (TENG JINDA)Free
Lefun Health is the official app for Lefun smartwatches and smart rings. Track steps, sleep, heart rate, blood pressure and sports. Free with 10M+ downloads on Google Play and 4.1★ rating.
Step Counting & Activity Tracking — 24/7 pedometer with daily step count, walking distance, active minutes, and calorie tracking synced from Lefun smartwatches; daily goal progress bars and weekly trend charts
Multi-Sport Mode — supports running, walking, indoor running, cycling, swimming, yoga, basketball, badminton, and more; each session records duration, distance, pace, heart rate zones, and estimated calories
Continuous Heart Rate Monitoring — real-time resting and workout heart rate with hourly, daily, and weekly charts; automatic high heart rate alerts on compatible devices
Sleep Tracking — automatic detection of sleep start and wake times; breakdown of deep sleep, light sleep, and awake periods; historical sleep trend analysis
Blood Pressure Monitoring — receives systolic/diastolic readings from compatible Lefun devices; long-term trend view to monitor cardiovascular health over time
Blood Oxygen (SpO₂) Measurement — spot-check and continuous SpO₂ readings on supported models; displayed alongside heart rate and activity data on the main dashboard
Women's Health Tracker — menstrual cycle logging and prediction; period reminders and health notes integrated into the main health dashboard
Water Intake & Hydration Reminders — log daily water consumption, set hydration goals, and receive reminders to drink throughout the day
Breathing Training — guided breathing exercises for relaxation and stress relief; customizable session duration and breathing rhythm
Notification Forwarding — receive call, SMS, WhatsApp, Facebook, Instagram, and other app alerts on the watch; per-app notification configuration
Watch Face Store — large dial library with analog, digital, sports, and seasonal designs; custom photo watch faces on compatible devices; VIP members unlock the full collection
Remote Camera Control — use the watch as a wireless shutter for your phone camera; ideal for group photos and solo shots
Health & Sedentary Reminders — customizable vibration alerts when sitting too long; also includes health reminder for regular metrics checks
Apple HealthKit Integration — sync steps, sleep, and heart rate data to Apple Health on iOS for a unified health dashboard across apps
Smart Ring Compatibility — full support for the Lefun smart ring alongside fitness bands and smartwatches; ring metrics (heart rate, SpO₂, sleep, stress) displayed in the same app interface
Introduction
Lefun Health is the official companion app for Lefun-branded smartwatches, fitness bracelets, and smart rings. Developed by Shenzhen TJD Information Technology Co., Ltd. (TENG JINDA), the Lefun Health app serves as a complete health and exercise management center — automatically recording steps, sleep, heart rate, blood pressure, blood oxygen, and workout data from your connected device. With over 10 million Google Play downloads and a consistent 4.1-star rating on both iOS and Android, Lefun Health is one of the most popular companion apps for budget fitness wearables.
Whether you just scanned the Lefun Health QR code from your new watch's instruction manual, or you're looking for a detailed Lefun Health app review before downloading, this guide covers everything you need: setup, features, supported devices, troubleshooting, and how the app compares to alternatives.
What Devices Are Compatible with Lefun Health?
The Lefun Health app is designed for the full range of hardware from Shenzhen TJD / Lefun, including:
Lefun Smart Bands — DSW001, TS12, and other BLE fitness bracelets with heart rate and step tracking
Lefun Smartwatches — square and round-face Bluetooth smartwatches with multi-sport modes and health monitoring
Lefun Smart Ring — the Lefun Health smart ring (also called Lefun Ring) for 24/7 heart rate, SpO₂, blood pressure, sleep, and stress tracking from your finger
Other TJD-platform wearables that reference "Lefun Health" in their setup guide or QR code
How to check compatibility: After installing Lefun Health, go to the device pairing screen, enable Bluetooth, and tap "Add Device". If your wearable appears in the scan list, it is compatible. The Lefun Health QR code printed on your device's box or instruction sheet will also take you directly to the correct app.
If you have a Lefun smart ring, make sure you download "Lefun Health" specifically — not a generic third-party app. Ring and band compatibility is device-specific.
Core Features of the Lefun Health App
Technical Specifications
Android Package Namecom.tjd.tjdmainS2
App Store ID1397285580
Android Minimum VersionAndroid 6.0+
iOS Minimum VersioniOS 13.0
App Size (iOS)266 MB
Current Version (iOS)3.67
Last Updated (iOS)January 27, 2026
Last Updated (Android)December 28, 2025
Google Play Downloads10M+
Google Play Rating4.1 / 5 (186K reviews)
App Store Rating4.1 / 5 (8.3K ratings)
Supported LanguagesEnglish and 24 more (25 languages total)
In-App PurchasesOptional VIP subscription: $3.99/month (removes ads, unlocks full watch face library)
Platform SupportiOS 13.0+ (iPhone, iPad, iPod touch), Android 6.0+ with Bluetooth 4.0
ConnectivityBluetooth 4.0 / 5.0 (BLE)
Age Rating (iOS)4+
Age Rating (Android)Everyone
DeveloperShenzhen TJD Information Technology Co. LTD (TENG JINDA)
Lefun Health is the official companion app for Lefun-branded smartwatches, fitness bracelets, and smart rings, developed by Shenzhen TJD Information Technology Co., Ltd. (TENG JINDA). It functions as a complete health and exercise management center: it automatically syncs data from your connected device to track steps, sleep, heart rate, blood pressure, blood oxygen, workout sessions, water intake, and women's health. The app also lets you customize watch faces, configure notifications and alarms, and receive phone alerts on your wrist. Lefun Health is available free on both Google Play (10M+ downloads, 4.1★) and the Apple App Store (8.3K ratings, 4.1★).
How do I connect my Lefun Health watch to my phone?
To connect a Lefun Health watch to your phone: (1) Download Lefun Health from Google Play or the App Store. (2) Open the app and grant Bluetooth, Location (Android), and Notification permissions. (3) Enable Bluetooth on your phone. (4) In Lefun Health, tap the device icon or 'Add Device' on the home screen. (5) On your watch, navigate to the screen that shows a QR code, a search icon, or a phone icon. (6) Tap 'Search Device' or 'Add' in the app — your watch should appear within seconds. (7) Tap your watch's name to confirm pairing. If your watch doesn't appear, restart both devices and try again. The Location permission is required on Android for Bluetooth scanning — this is a system requirement, not a privacy concern.
What is the Lefun Health QR code for?
The Lefun Health QR code printed on your device's box, instruction manual, or on the watch screen itself serves two purposes: (1) It takes you to the correct app download page (Google Play or App Store) so you get the right companion app for your specific device. (2) On some Lefun watch models, displaying the QR code screen on the watch itself is the required state for Bluetooth pairing — the app can only discover the watch when it is showing this screen. If you're having trouble connecting, try navigating your watch to the QR code display and then tapping 'Add Device' in the Lefun Health app.
How do I reset a Lefun Health watch?
To reset a Lefun Health watch: (1) On the watch itself, go to Settings → Reset or Factory Reset. The exact menu path varies by model — check your device manual. (2) Alternatively, from the Lefun Health app, go to Device → Settings → Reset Device. After a reset, the watch will restart and you will need to re-pair it with the app. A factory reset erases all data stored on the watch (step history, alarms, etc.), so use it only when troubleshooting persistent connection issues or preparing to transfer the device to a new phone.
Is the Lefun Health app safe to use?
Yes, Lefun Health is a legitimate application from Shenzhen TJD Information Technology Co., Ltd., available on both Google Play and the Apple App Store. It has over 10 million installs and a 4.1-star rating. The app requests standard permissions: Bluetooth (device communication), Location (Android BLE scanning), and Notifications (to forward alerts). An optional VIP subscription ($3.99/month) removes ads and unlocks the full watch face library, but all core health-tracking features are free. The privacy policy is published at app.ss-tjd.com. Health data recorded by Lefun Health is for personal reference only and is not a substitute for medical advice.
What smartwatches and devices are compatible with Lefun Health?
Lefun Health is compatible with the full range of TJD/Lefun hardware including: Lefun fitness bands (DSW001, TS12, and similar BLE bracelets), Lefun smartwatches (square and round-face Bluetooth models with multi-sport modes), and the Lefun smart ring (for 24/7 heart rate, SpO₂, blood pressure, sleep, and stress tracking from your finger). The easiest way to confirm compatibility is to check the box or instruction manual of your device — if it has a Lefun Health QR code or mentions 'Lefun Health', the app is the correct companion. In the app, tap 'Add Device' and scan — if your device appears, it is compatible.
How do I download Lefun Health?
To download Lefun Health: on Android, go to Google Play and search 'Lefun Health', or use the direct link for package ID 'com.tjd.tjdmainS2'. On iPhone or iPad, open the App Store and search 'Lefun Health' (App ID: 1397285580). The app is also available from the official download page at h5-overseas.sz-tjd.com/download/en and from third-party Android repositories (APKPure, Uptodown, Softonic) for regions without Google Play access. The app is free to download; optional VIP membership ($3.99/month) unlocks premium watch faces and removes ads. System requirements: Android 6.0+ with Bluetooth 4.0, or iOS 13.0+.
Does Lefun Health work on PC or Mac?
There is no official Lefun Health desktop application for PC or Mac. The app is designed for iOS and Android smartphones. However, you can run the Android version on a Windows PC using an Android emulator such as BlueStacks or LDPlayer — search 'lefun health for pc' or 'lefun health for windows' for setup guides. Note that Bluetooth pairing may be limited in emulators depending on your PC's Bluetooth hardware. For the best experience and full functionality (especially Bluetooth device sync), using Lefun Health on a phone is strongly recommended.
How do I change the time or settings on my Lefun Health watch?
Time on a Lefun Health watch syncs automatically when you connect to the Lefun Health app — there is no need to set it manually. After pairing, the watch time will update to match your phone's time and timezone. If the time is wrong, check your phone's time settings and re-sync. To change other settings (alarm, watch face, notification preferences, screen brightness, sedentary reminder), open Lefun Health, go to the device page, and tap on the settings icon. Changes sync to the watch via Bluetooth when your phone and watch are in range.
What is the Lefun Health VIP subscription and is it worth it?
Lefun Health offers an optional VIP membership at $3.99 per month (auto-renewing, billed to your iTunes / Google Play account). VIP benefits include: (1) ad-free app experience (the free version shows frequent ads), (2) access to the full watch face library in the dial store, and (3) priority access to new features. The subscription can be cancelled anytime by turning off 'auto-renew' in your Apple ID / Google Play settings at least 24 hours before renewal. Core health-tracking features (steps, sleep, heart rate, notifications, sport modes) are all free. The VIP plan is mainly worth it if ads are a significant friction point or if you want more watch face choices.
How do I use the Lefun Health app with a smart ring?
To use the Lefun Health app with a Lefun smart ring: (1) Install Lefun Health on your iOS or Android phone. (2) Charge your ring fully before first use. (3) Open the app and go to 'Add Device' — the ring should appear in the Bluetooth scan as a 'Lefun Ring' or similar identifier. (4) Tap to pair and wait for the initial sync. The ring will then continuously track heart rate, SpO₂, blood pressure, sleep stages, and stress. All ring data appears in the same Lefun Health dashboard as other health metrics. If you own both a ring and a watch, both can be connected to the same Lefun Health account.
User Reviews
Larxxii
App Store
I bought this smart watch on Wish for about $4, while yes, the instructions didn't specify how to charge it, I was able to find the information by a quick Google search. I've only had the watch for a day and I've really enjoyed it! I've been able to tailor it to my liking. For $4 I would say just getting the message and alerts is well worth it, plus being able to turn my wrist and see the time is nice. I haven't found anything wrong with it yet, I figured I'd write one while everything is going well to give this app a fair shot. It's pretty cool!
Shelbskb
Wizard 91919
yssvj
HealthTracker2024
Maria Santos
David K.
Park Ji-won
FitnessFan_Mike
Liu Wei
Changelog
v3.67 — Jan 27, 2026:
· Fixed known issues and optimized user experience
v3.66 — Dec 15, 2025:
· Fixed known issues and stability improvements
v3.65 — Nov 8, 2025:
· Fixed known bugs and optimized user experience
v3.64 — Oct 3, 2025:
· Performance improvements and bug fixes
v3.63 — Aug 22, 2025:
· Optimized Bluetooth connection stability
· Improved sleep tracking accuracy
· Bug fixes
v3.62 — Jul 10, 2025:
· Enhanced women's health tracking features
· Improved notification forwarding reliability
· UI improvements
v3.61 — May 29, 2025:
· Added new watch face styles
· Improved blood pressure data display
· Bug fixes and stability improvements
v3.60 — Apr 15, 2025:
· Smart ring support improvements
· Enhanced SpO₂ monitoring display
· Performance optimizations
v3.59 — Mar 3, 2025:
· Added breathing training guided sessions
· Improved activity data charts
· Bug fixes
Pricing InfoFree to download with all core health-tracking features included. Optional VIP subscription at $3.99/month removes ads and unlocks the full watch face library. Manage subscription via Apple ID / Google Play account settings.
After some frustration I finally connected the wristband. I removed any pairing in iOS from earlier attempts. Then in the Lefun Health app I went to settings and changed the display on the wristband to the search/phone icon display. With that displayed I returned to the app and selected Search Device. The connection was almost instantaneous. Also, after you 'search', a MAC number will appear on the top of the screen — you must click on that number to continue with syncing. Hope this helps others!
App Store
Now that I have months using the APP I have come to appreciate what it can do. My frequent need to check my BP I find the RING a quick convenience for that. The readings are accurate, matching other equipment. The app has grown on me — once you get past the initial setup learning curve, tracking your health daily becomes quite easy and the data views are clean.
App Store
I really like the watch and how easy it was to set up the app, though I'm a bit disappointed in the watch face options — there's not a lot. The custom watch face only lets you add a picture and the time/date layout can't be changed. It would be nice if we could change the font or position of the time on custom faces. I like the watch — it's very convenient and easy to operate — but the app needs more features so that the watch can be even better.
App Store
Been using Lefun Health for 6 months with my Lefun band and I'm genuinely impressed. The sleep tracking is surprisingly detailed — it shows deep sleep, light sleep, and REM breakdown. The step counter matches my Fitbit within about 5%, and heart rate readings are consistent with my doctor's office measurements. The app layout is clean and easy to navigate. The one-tap sports mode start from the watch is great for outdoor runs. Highly recommend for anyone who wants solid health data without spending a lot.
Google Play
Excellent app for tracking my daily health. I use it with my Lefun smartwatch and the connection stays stable all day. The heart rate monitoring runs continuously and I appreciate that I can see trends across weeks. The women's health tracker is a thoughtful addition — having cycle tracking alongside all my other health data in one app is really convenient. The watch face options are nice too. For a free app this is genuinely impressive.
Google Play
Good fitness companion app. I use Lefun Health with the smart ring and I find the blood pressure and SpO2 readings useful for tracking trends — not medical grade but good enough for daily monitoring. The ring charges fast and lasts about 5 days. The app dashboard is clean. My only complaint is that some of the better watch faces are locked behind the VIP subscription. But core functionality is solid and free.
Google Play
The app works well for my Lefun smartwatch. Setup was straightforward — I scanned the QR code from the box, found Lefun Health on the App Store, and was connected in under 3 minutes. Sleep tracking and step counting are the features I use most and both work reliably. The sedentary reminder is helpful during long work-from-home days. I'd like to see more detailed sport analytics but overall it's a solid free app.
Google Play
Does the job for basic health tracking. Step counting is accurate, sleep tracking is helpful, and notification forwarding works perfectly once you grant all the permissions. The ads can be annoying in the free version — they pop up when browsing watch faces mostly. But since all the health tracking features are completely free, I can live with it. Connection has been stable for 4 months. Decent app for a budget watch.
Google Play
Lefun Health 应用体验很不错。心率监测和睡眠分析数据准确，界面设计清晰直观。配合 Lefun 智能戒指使用，血氧和血压数据非常方便。运动记录功能也满足了我日常跑步和骑车的需求。应用响应速度快，蓝牙连接稳定。强烈推荐给 Lefun 设备用户。
Overall Rating
4.1
Google Play Downloads10M+
Version3.67
Size266 MB
Last Updated2026/01/27
Age Rating4+
Supported DevicesLefun fitness bracelets (DSW001, TS12 and others), Lefun smartwatches (square and round-face BLE models with multi-sport modes), Lefun Smart Ring (heart rate, SpO₂, blood pressure, sleep, stress tracking from finger). Compatible with all TJD-platform wearables that reference 'Lefun Health' in their instruction manual or QR code.
Supported LanguagesEnglish and 24 more languages (25 total, including Simplified Chinese, Traditional Chinese, Japanese, Korean, French, German, Spanish, Italian, Portuguese, Arabic, Russian, and others)
CompatibilityRequires iOS 13.0 or later (iPhone, iPad, iPod touch). Android 6.0+ with Bluetooth 4.0 or above. Available worldwide.
Published date2026/03/12
Activity & Step Tracking
The Lefun Health app records your daily step count, walking distance, active minutes, and calories burned in real time via Bluetooth sync. Set personal step goals, view weekly and monthly trends, and compare your activity levels over time. Data updates automatically throughout the day.
Multi-Sport Mode
Lefun Health supports a wide range of sport modes including running, walking, indoor running, cycling, swimming, yoga, basketball, badminton, and more. When you start a workout on the watch or in the app, the session records duration, pace, distance, heart rate zones, and estimated calories burned.
24/7 Heart Rate Monitoring
Continuous heart rate tracking captures resting heart rate throughout the day and workout-level peaks during exercise sessions. The app displays heart rate charts by hour, day, and week so you can spot trends and identify elevated readings.
Sleep Monitoring
Lefun Health automatically detects sleep when you wear the device at night. The app provides a detailed breakdown of total sleep time, deep sleep, light sleep, and awake periods. Review historical sleep data to build better habits.
Blood Pressure & SpO₂ Tracking
On compatible Lefun devices, the app receives blood pressure readings (systolic / diastolic) and blood oxygen saturation (SpO₂) data directly from the wearable sensor. Regular tracking helps you spot long-term trends alongside your activity data.
Women's Health
Lefun Health includes a menstrual cycle tracker with period logging, prediction, and health reminders — integrated alongside your other daily health metrics on the main dashboard.
Water Intake & Breathing Training
Set daily hydration goals and log water intake throughout the day. The app also includes guided breathing exercises for stress relief and relaxation.
Notification Forwarding
Once your phone is connected, Lefun Health forwards incoming call alerts, SMS, and supported app notifications (WhatsApp, Facebook, Instagram, and others) to your watch as vibration alerts. Configure which apps send notifications in the app settings.
Watch Face Customization
Browse the Lefun Health dial store for a large selection of watch faces including analog, digital, and seasonal styles. VIP members can access the full library; free users have access to a rotating selection. Some devices also support custom photo watch faces.
Smartwatch Utility Features
Remote Camera — trigger your phone camera from the watch
Find Device — make the watch vibrate to locate it
Alarms — set multiple alarms from the app, synced to the watch
Sedentary Reminders — vibration prompt when you've been sitting too long
Weather Push — current weather displayed on compatible watch faces
Business Card / Wallet — quick-access screen on supported models
Frequent Contacts — call or message contacts directly from your wrist
Open the app and create an account or sign in (or skip for local-only use)
Grant required permissions: Bluetooth, Location (Android BLE requirement), and Notifications
Enable Bluetooth on both your phone and your Lefun device
In the app, tap the device icon or "Add Device" on the home screen
The app scans for nearby Bluetooth devices — select your watch or ring from the list
Confirm pairing on both the app and device if prompted
Wait for the initial data sync to complete (this may take 30–60 seconds)
Configure notifications, alarms, health reminders, and watch face in the settings
Tip: If your watch doesn't appear during scanning, try displaying the QR code screen (or the search/phone-icon screen) on the watch before tapping "Add Device" in the app. This is a known step for some Lefun models.
Is Lefun Health Safe?
Lefun Health is a legitimate app from a registered Chinese technology company (Shenzhen TJD Information Technology Co., Ltd.) with millions of users worldwide. Here are the key privacy facts:
The app is available on both Google Play and Apple App Store and passes platform security reviews
Required permissions: Bluetooth (device communication), Location (Android BLE scanning), Notifications (to forward alerts to watch), and optionally HealthKit (iOS sync)
An optional VIP subscription ($3.99/month) removes ads and unlocks the full watch face library — the core health tracking features are completely free
Some users report intrusive ads in the free version that appear frequently when navigating the app
The VIP paywall blocks certain dial store items and some premium features
Grammar and wording in the English UI can feel machine-translated in some menus
Our assessment: Lefun Health is suitable for everyday fitness tracking. If you want an ad-free experience, the $3.99/month VIP plan resolves the main friction point.
Lefun Health vs Competing Apps
Feature
Lefun Health
Da Fit
HiWatchPro
VeryFit
Developer
Shenzhen TJD
Mo Young Ltd
Shenzhen Jusheng
Shenzhen Airy
Downloads
10M+
50M+
50M+
10M+
Smart Ring support
Yes
No
No
No
Blood pressure
Yes (device-dependent)
No
No
Yes
Subscription
$3.99/mo (optional)
Free
Free
Free
App Store rating
4.1★
4.7★
3.0★
4.0★
HealthKit sync
Yes
Yes
Yes
Yes
Bottom line: If your Lefun device's QR code or instruction manual points to Lefun Health, download Lefun Health — companion apps are device-specific and cannot be swapped. The smart ring support and blood pressure tracking set Lefun Health apart from simpler competitors.
Troubleshooting Lefun Health
Lefun Health Not Connecting
Ensure Bluetooth is enabled on both your phone and device
On Android, enable Location Services (required for BLE scanning)
Confirm your device is not already paired to another phone's Bluetooth
Restart both your phone and your Lefun device
Update Lefun Health to the latest version
If still failing: forget the device from Bluetooth settings, uninstall the app, restart, reinstall, and pair fresh
Notifications Not Working
Open Lefun Health → Settings → Message Reminder and enable the apps you want
Grant Lefun Health Notification Access in Android system settings (Settings → Notifications → App Notifications)
Add Lefun Health to your battery optimization whitelist
Disable Do Not Disturb on both phone and watch
Data Not Syncing
Open Lefun Health and manually trigger a sync by pulling down on the home screen
Verify the Bluetooth connection icon shows as connected
Ensure your device has sufficient battery (>10%)
Restart the app if data is delayed more than 30 minutes
