I am not sure that people always need to actively navigate when on foot. You just go in the right general direction noticing places you recognise. You could s

I am not sure that people always need to actively navigate when on foot. You just go in the right general direction noticing places you recognise. You could subtly push the user along paths they have taken before and resist unknown paths. With gentle enough vibration and enough use would you even notice the prompting? It would just become a part of your natural navigation instead of the constant nagging of turn by turn.