Starting a new project with
https://github.com/route-me/route-me is not a good idea, it is no longer maintained, and there are many better alternatives.
https://www.mapbox.com/mapbox-ios-sdk/ is based on route-me, but is still maintained. There is also mapbox-mobile which is an entirely new project based on different tech and does vector map rendering, but can not yet do many of the things that route-me could. Another option is
https://github.com/mousebird/WhirlyGlobe which is a differend take on mobile mapping and has lots of advanced features, but if your main need is map display it's probably more complex than you need.
- Jesse