Hi! I understand you're having trouble connecting your HryFine watch to an Apple device using the HryFine app. Just to clarify, are you trying to pair the watch with an iPhone or an Apple Watch, and what specific connection issue are you experiencing? For example, is the watch not appearing in Bluetooth devices, or does it fail to sync after pairing?

Meanwhile, here are some common steps you can try to get it connected:

1. Restart Devices: Switch off and then on both your HryFine watch and your Apple device. This refreshes Bluetooth and system processes.

2. Bluetooth Check: On your Apple device, go to Settings > Bluetooth and make sure Bluetooth is turned on. Also, check for any existing connections with other devices and disconnect if unnecessary.

3. HryFine App Permissions: Open the HryFine app and verify it has permission to access Bluetooth and Notifications (since notifications often require special permissions on iOS).

4. Forget Previous Pairings: In your Bluetooth settings on the Apple device, if you see your HryFine watch listed, tap it and select “Forget This Device.” Then try pairing fresh through the app.

5. App Version and Firmware: Make sure the HryFine app is up to date on your Apple device, and that your HryFine watch firmware is current. Sometimes an update resolves compatibility issues.

6. Close Other Bluetooth Interference: Turn off other Bluetooth devices that might interfere with pairing or connectivity.

If you have tried some of these already, please let me know which ones, and any error messages or behaviors you notice. That way, I can help you with more advanced troubleshooting or specific fixes.

Also, if you're interested, I have found some setup guides and videos that walk through the process, which might be helpful:
- How to setup and connect HryFine Smartwatch to iPhone: YouTube
- Troubleshooting connection issues on Apple Support Communities: Apple Forum

Let me know how it goes or if you want me to guide you through the steps!