Visual Guiding for mountain bikers
I use the offline turn by turn guiding quite often during my mountain bike trips and have my Samsung mounted on the handlebars.
I can't hear the voice guidance when riding so I think it would be a great option to have the directional arrows to appear larger on the screen and taking up the entire screen. Between guidance points the screen should switch off in order top save battery power.
The arrows should also be in high contrast as the screen is hard to read outside with the sun on it.