navigation

HI there, anyone using a phone app for navigation when touring and what's your thoughts? I've read up on a few but the reviews aren't the greatest, just wondering if anyone can recommend one. Cheers!

As I like to swap my satnav between my different bikes, I installed a RAM-ball mount on the left mirror clamp. You just exchange the std bolt for the elongated one from the RAM-ball. 12 Volt is taken from the standard power socket.