Is there an app for my phone which is better for cycling than Google maps?

I use cycle streets

It’s for fastest route, balanced route and quiet routes- you choose. The app does use canal tow paths on some routes and also Sustrain routes

If you google national sustains route it will show you the map of uk with routes marked and numbered

Cycle streets will route to avoid large incline and keep you on the flat where possible

Another good mapping website is cycle.travel

It uses quieter roads and paths.

If you're used to creating your own routes, ridewithgps.com is very useful.

Try BikeHub. It is populated by cyclists. I've found some interesting routes in Glasgow that I wouldn't otherwise have known about.

From memory, you can search on quickest, flattest, quietest and "most balanced" routes.

Map my ride and strava work well, they mostly track your routes but they also give you route suggestions that other people have taken