Tour App
The tour app of “Gastlandschaften Rheinland-Pfalz” from Outdooractive is available free of charge in the Apple Store and on Google play.
The tour planner contains cycle routes and hiking trails.
It even works offline, but the app only exists in German.
https://play.google.com/store/apps/details?id=de.alpstein.alpregio.Rlp
https://itunes.apple.com/de/app/gastlandschaften-rheinland-pfalz-touren-und-mehr/id449845449?mt=8