turn-by-turn app

I just saw this on another forum (posted last year) so I was wondering if this app is out. Apologies if I am way behind on this.

"The main point to the app is that you can just put your phone on your handlebars, fire up the app and go. It'll give you a map to follow and turn-by-turn directions along the way."

I have been trying to get RWGPS to do something like this because I just cannot read the turn by turn instructions on my tiny Wahoo screen, so if this site has this app, then I'm sorted.

Hairy verses safer?

Just a comment comparing different routes from different folks:

I have a route I am planning to ride next May going from Street in Somerset to Bewdley near Bridgenorth; 

This route is provided by my good friends at Peak Tours (I'm not riding with them - this time) of 111 miles. It is extremely hairy in places particularly going over the west side of Bristol up to the Severn Bridge. Checking a route with Cycle.Travel for the same beginning and end points yields 139 miles. 

One choice maybe much safer, but comes at the expense of an additional 1-1/2 hours riding - for me - on an already long day's cycling. The other choice is shorter but some of the route is downright scary and I'd be well advised to have local taxi numbers available to hop over some of these death traps.

Just a for instance comment. :-)

Editing?

I want to ask the group if it would be useful to add some editing to the Openstreetmaps. Such as when I design - or ask for - a route, some of the cues state turns like: "Turn into minor road". If I go to Google maps, I can then see the actual name of that 'minor road. I could then - if I signed up to Openstreetmaps - add the name of that street/road to the Open maps. Would that be a useful worthwhile endevour or not, since anyone could compare Google with Open to obtain the same information?

Is it an algorithm?

How does the system decide on where to direct a route once a user asks for a 'safe' or otherwise route? 

Is there are hoard of Tolkien like little people scribbling away in a attic or outbuilding once a route is requested, or is there a library of routes already predetermined by the same scribblers - or possibly a more advanced little people from another culture?

Improving route viewing

Using the excellent route provided by this site, I note that the cue will often simply state something like: 'Leave on minor road' or 'Bear L (left) on minor road', and 'Fork R (right) onto minor road'. I have found this leads to confusion since the actual instruction is somewhat tenuous. 

So, to improve the cue (I use cue sheets rather than any GPS device - easier to read and it is better with the route descriptions) I go to Google Maps UK, then Street View then take look at the actual location and note on my cue sheet any distinguishing features such as 'big white house' or 'painted sign' or anything standing out at the junction to confirm I am on the right road.