Hi there! I see you’re having trouble setting your weight and the Save button for height is missing on the Height and Weight screen of the SmartHealth app. Let’s get to the bottom of this together.

To start, could you tell me if you’re entering the weight manually or trying to sync it from a smart scale? Also, have you noticed if any buttons or fields are greyed out or unresponsive? Knowing this helps me narrow down the cause.

Meanwhile, here are some steps to try:

1. Restart the App: Close the SmartHealth app completely and reopen it. Sometimes a simple restart refreshes the interface and brings missing buttons back.

2. Check for Updates: Since you're on Android OS 10 with WebKit, make sure your app is updated to the latest version available on the Play Store. Updates often fix UI glitches.

3. Clear Cache: Go to your device’s Settings > Apps > SmartHealth > Storage and clear the cache. This can help clear any corrupted temporary data causing display issues.

4. Try Manual Entry Again:
- For height, tap on the height field and see if any keyboard or number selector pops up.
- For weight, if the field is uneditable or blank, try tapping it once firmly.

5. Look for Save or Confirm Gestures: On some apps, the Save button might appear only if you scroll down or after you enter a value. Also, some apps auto-save when you press back or navigate away after input.

6. Check Permissions: Go to Settings > Apps > SmartHealth > Permissions and ensure it has required permissions (e.g., storage, Bluetooth if syncing scale).

If you’ve already tried those or none of these work, there might be a software glitch or a version incompatibility with your device’s WebKit browser engine. Reinstalling the app could help by resetting all settings fresh.

Would you mind trying these and letting me know what you observe? That way, I can guide you further based on what happens.

Are you satisfied with these initial steps?