Hi there! I see you're running into a certificate error when trying to sign in to the Lefun Health app on your WebKit browser with Android 10. Let’s work through this together.

To get started, could you tell me:
- Is this error happening in the Lefun Health app itself, or when accessing Lefun Health via a web browser?
- Does the error message explain anything more (like expired certificate, untrusted certificate, or something else)?
- Have you tried restarting the app or your device already?

In the meantime, here’s a step-by-step approach for this kind of certificate error:

1. Restart App and Device: Sometimes, the app or your phone may need a fresh start to refresh network certificates.

2. Update the Lefun Health App: Make sure your app is the latest version from the Play Store, as outdated apps can have certificate mismatches.

3. Check Date & Time Settings: SSL certificates validate based on your device’s date/time. Verify that your Android device’s date and time are set correctly, preferably set to automatic.

4. Clear App Cache & Data:
- Go to Settings > Apps > Lefun Health.
- Tap Storage > Clear Cache.
- If that doesn’t help, try Clear Data. (Note: this often requires you to sign in again.)

5. Check Network Connection:
- Sometimes a network’s firewall or security settings interfere with certificate validation.
- Try switching from Wi-Fi to mobile data or vice versa.

6. Check Device’s Trusted Certificates:
- Go to Settings > Security > Trusted Credentials, and verify that your system certificates aren’t expired or removed.

If you’ve already tried any of these steps, please let me know which ones, and I can guide you deeper or explore alternative solutions.

Are you using any VPN or proxy on your phone that could impact secure connections?

Let me know how these steps go or provide more details so I can assist further!

Lefun app itself

Doesnt say anything extra

Restarded both

Thanks for clarifying that it’s the Lefun Health app itself showing a certificate error without more details and that you’ve already restarted both the app and device. That helps narrow down the issue.

Since the message doesn’t specify the certificate problem more clearly, let’s try some focused steps that are relevant specifically to the Lefun Health app on Android 10:

1. Update the Lefun Health App:
- Even if you can’t sign in right now, check the Google Play Store for any available updates for Lefun Health and install them. Sometimes certificate issues happen when the app version is outdated.

2. Clear App Cache and Data:
- Go to Settings > Apps > Lefun Health.
- Tap Storage, then Clear Cache.
- If the issue persists, tap Clear Data (note you’ll be signed out and may need to sign in again).

3. Check Android Date & Time Settings again:
- Verify your date, time, and time zone are set to automatic under Settings > System > Date & Time. Certificates rely heavily on accurate system time.

4. Switch Network Connection:
- Try switching from Wi-Fi to mobile data or vice versa. Some networks may intercept secure connections causing certificate errors.

5. Reinstall the App:
- Uninstall Lefun Health completely, then reinstall it from Google Play.

6. Check for Trust Credential Issues:
- Go to Settings > Security > Trusted Credentials and look under the System tab to confirm system certificates are intact and enabled.

If all these don’t resolve it, it could potentially be an issue with the app's server certificates or your specific network environment blocking secure connections. Let me check if there are any reported Lefun Health server certificate problems or more targeted solutions available. One moment please.

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I found no official or widespread reports of Lefun Health app certificate errors recently, but some users do face connection issues related to Bluetooth or pairing that can overlap with app problems1 2.

If the app still won’t accept your login after these steps, I recommend contacting Lefun Health support directly through their help center or app feedback options, since they can check if the certificate or server side has changed or is down from their end:
https://lefunapp.com/help-center/

Please try the above and let me know how it goes. I’m here to help you through this! Are you okay with starting with these steps?

How do i connedt the watch to messages and whatsapp

Great question! Connecting your Lefun Health smartwatch to receive messages and WhatsApp notifications involves a few steps within the Lefun Health app and your phone’s settings. Let me guide you through the process step-by-step:

1. Pair Your Watch to the Lefun Health App:
- Make sure your watch is powered on and Bluetooth is enabled on your Android 10 phone.
- Open the Lefun Health app and connect your smartwatch if you haven’t already.
- The watch time and calendar should sync once connected.

2. Enable Message and WhatsApp Notifications:
- In the Lefun Health app, look for the Notifications or Message reminder settings.
- Turn on Message reminders or Notification alerts, making sure WhatsApp and SMS/Messages are enabled.

3. Allow Notification Access:
- On your Android phone, go to Settings > Apps & notifications > Special app access > Notification access.
- Enable notification access for the Lefun Health app.

4. Check Battery Optimization Settings:
- Sometimes Android’s battery optimization can block notifications.
- Go to Settings > Battery > Battery optimization.
- Find Lefun Health and set it to Not optimized or Allow background activity.

5. Test Notifications:
- After setup, send yourself a test WhatsApp message or SMS.
- Your watch should vibrate and display the notification.

If you want a visual guide, there are step-by-step tutorial videos that show the connection and enabling message reminders on the Lefun Health app:
Video Tutorial on Connecting Lefun Health Smartwatch
How to Enable WhatsApp Notifications

Do you want me to walk you through the screen settings on your phone or Lefun Health app now?