I’ve been using the Navionics app on an iPad with this Garmin Glo for years. My Glo finally quit working so I ordered a new Glo 2 to replace it. When I tested the old Glo with the battery from the new one, it fired up fine. I tested the bluetooth and satellite connection and it seems good as new, it just needed the new battery. If anyone wants my old Glo, I’d sell it for $30 plus you’d need to order a new battery, available on Amazon.