To address the stuttering issue with the QuickRead app on your Android device, consider following these steps:

1. Check for Updates: Ensure that both your QuickRead app and your Android operating system are up to date. Open the Google Play Store, search for QuickRead, and see if an update is available. Also, go to Settings > System > Software Update to check for Android updates.

2. Clear App Cache: Sometimes, cached data can cause performance issues. To clear the cache for QuickRead, go to Settings > Apps > QuickRead > Storage > Clear Cache. This will remove any temporary files that might be causing the stutter.

3. Restart Device: A simple restart can resolve many temporary issues. Power off your device, wait a moment, and then power it back on.

4. Adjust Refresh Rate: If you're still experiencing stuttering, try switching between the refresh rates. Go to Settings > Display > Refresh Rate and toggle between 60Hz and 90Hz as follows: Set it to 60Hz, then switch back to 90Hz. This can sometimes reset the system's handling of refresh rates and improve performance - learn more - learn more.

5. Developer Options: If you have Developer Options enabled, check for settings that might affect performance. Go to Settings > Developer Options and find "Logger Buffer Sizes." Set it to "off" as this setting can potentially resolve stuck refresh rates - learn more.

6. Close Background Apps: Stuttering can be exacerbated by too many applications running concurrently. Close all unnecessary apps by accessing the Recent Apps view and swiping them away.

7. Monitor Performance: If the issue persists, consider installing a performance monitoring app to check for underlying problems, such as CPU load or memory usage. It can help identify if other apps are affecting performance.

8. Factory Reset: If none of the above solutions work, consider a factory reset as a last resort. This will restore your device to its original settings. Ensure to back up your data before proceeding by going to Settings > System > Reset Options > Erase all data (factory reset).

Implementing these steps should help alleviate the stuttering in the QuickRead app. If the problem continues, you may want to contact QuickRead support for further assistance - learn more - learn more.