Are there any iPhone apps that allow you to: - import a route (in GPX format?) created using an online service like RideWithGPS, MapMyRide, etc - download map tiles for the route so you don't need a constant cell or WiFi connection - get turn-by turn guidance as you follow the downloaded route; don't need voice prompting but a ping/beep on my Bluetooth headset (Sena SMH10) before each turn would be nice None of the inexpensive Garmin GPS units will deliver prompts to a Bluetooth headset (and Zumo is too expensive for me), so I'm back to looking for something on the iPhone. I've tried Motion X GPS-Drive. It's great at getting you from Point A to Point B as long as you don't care which route you take. I usually have specific roads that I want to ride and Motion-X doesn't make that easy enough. It sounds like Motion-X GPS will show routes and download map tiles, but doesn't do prompting.