eRoutes Walk Run Cycling is the ultimate app to help you with your fitness. With this app, you can set your GPS routes and eRoutes will plan the best routes for you. eRoutes is also an excellent audio guide for your runs, walks, and cycling rides.

It is free to use, with no ads. You can download it on Android and iOS devices. 

The app also provides walking and cycling training plans. These plans range from 3 kilometers to 50 kilometers per week. You can choose the length of the plan, depending on how much time you have. The plans also include an excellent calendar, so you know when to start and stop your workouts. eRoutes is also very helpful if you want to explore new walking, running, or cycling routes.