I don't bother with any of these, even the Garmin. I buy a refurbished phone instead, use a wireless charger mount for it on the bike and that way I have access to all apps, not some hokey junk navigator app no one has heard of with poor map updates. Since its just a refurbished phone I don't care about what the vibrations do to the camera, and I plug up all holes to make it waterproof. I've never liked Garmin maps anyway, as my car has a Garmin nav which put me off Garmin for life.
How is it this popped up after I bought one? It’s still going two weeks later and is actually more capable than I was expecting. Got it to read KML files and hopeful of GPX files. Was surprised to see it write a track to GPX but haven’t got it to load one yet. Any advice would be helpful.
I also bought a very similar one (Karadar) and well it worked more or less until the screen dropped off after bein in the sun for an hour, Tried to fix it up and now working again but I am not confident about it. The display is not visible under mid shine sunlight and have to be moving backward and forward very often to see the screen. Better would have bought a Garnin 396,.. actually I better buy it and trash this chinese bullshit