Leadnav is a one time buy. $19.99 I think. Its just like any other app, they give you free update periodically. I think they might be working on coming out with an android version. I have not used all the features while off road, but you can set it up to call out pace notes to you. It helps when you know there is a wash out or danger up ahead.
The suction cups and magnet held for 10 days in baja. I was skeptical too, but they worked flawlessly. It never moved from its original place in my previous picture.
I have the Mob X mount.
https://mobarmor.com/shop/mob-grip-x/
Gaiagps sucks. Does it work, yes. Is it user friendly and give you detailed maps, hell no.
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Using a ipad as a gps and having it on your dash is the way to go. You can use the camera, itunes, gps app, watch movies, and if you have internet, check forums and status reports during a race. It essentially puts a computer on your dash.