Both MapMyRide and RideWithGPS have turn-by-turn navigation and allow you to import downloaded routes in .GPX/.TCX formats. They are also bike specific apps that also connect to external sensors which you can't do with Osmand. Maybe it's just me, but I fail to see the advantage of running two GPS apps on a phone, simultaneously.
__________________
HCFR Cycling Team
Ride Safe ... Ride Hard ... Ride Daily
2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress