Before Kurviger, I used OsmAnd with audio only guidance (smartphone in the pocket), so I have some experiance navigating solely by audio.
Without visual information, It is essential to get some feedback from time to time:
- Is the app still alive?
- Are you still on track?
As Patrick mentioned, the “route missed” message is meaningless, and doesn’t help very much. I don’t think, that repeating it will improve the situation very much.
So, what can be done to improve voice only guidance?
- Repeat the turn instructions, to confirm that you are still on track.
"I am alive" message - Say the “next instruction” soon (100m?) after a turn, mainly to confirm that you have taken the right way.
Voice guidance after instruction points - Maybe: instead of “route missed” wait a littel longer, and then say something more useful. e.g. “your route is 500m away direction 9 o’clock”
Manfred