In order to ensure the app records the correct workout distance and time, the GPS should be set correctly. See below:

iOS Device:
  1. Go to Settings > Privacy > Location Services
  2. Turn on the Location Services
  3. Go to app Settings > Workout Option
  4. Turn on Enable GPS
  5. Do not start a workout until GPS signal turns green
Android Device:
  1. Go to app Settings > Workout Options
  2. Check Use GPS                                                
  3. Go to Settings > Location Services
  4. Check Use GPS satellites 
  5. Do not start workout until GPS signal turns green                                   
  • Note: If you are running indoors on a treadmill, the app will not be able to give you reliable distance measurements as it uses GPS to track your run assuming you were running outdoors.