You might want to check your Location Services for the App. I can confirm it's working on my iPhone 6+ and a Samsung Note. I suspect the GPS, Location Services or a minor setting has been tweaked. You can look at the iPhones Settings -> Privacy -> Location Sevices. Make sure they are on and make sure the iFly GPS is set to Always Use. We ask at install, if no is selected it will not use the GPS. Should be a simple fix. Hope this helps.