A. 1. Calibrate the app: Open the Golf GPS Range Finder app and go to settings. Look for a calibration option and follow the instructions to ensure accurate yardage readings. 2. Check GPS settings: Ensure that your iPhone's location services are enabled. Go to Settings > Privacy > Location Services and make sure it’s turned on for the Golf GPS Range Finder app. 3. Clear app cache: Sometimes, clearing the app cache can help. Go to the app settings and look for an option to clear cache or reset data.

B. 4. Use the app in open areas: GPS accuracy can be affected by tall buildings or dense trees. Try using the app in more open areas to see if the yardage readings improve.