Apps like QuadNB

Here are some great alternatives to QuadNB by Mapgears :
Lost Riders
Lost Riders
★3.5
TrailView
TrailView
★3.3
BRP GO!: Maps & Navigation
BRP GO!: Maps & Navigation
★3.4
The Next Trail
The Next Trail
★4.1
Colorado Trail Explorer
Colorado Trail Explorer
★4.2
TrailSmart: Great Trails of th
TrailSmart: Great Trails of th
★5.0
onX Offroad: Trail Maps & GPS
onX Offroad: Trail Maps & GPS
★3.6
BikeComputer
BikeComputer
★4.2
Overland Bound One: Map & GPS
Overland Bound One: Map & GPS
★4.4
MTB Project
MTB Project
★4.2
Trails Offroad
Trails Offroad
★3.2
BackCountry Nav Topo Maps GPS
BackCountry Nav Topo Maps GPS
★3.8
OS Maps: Explore hiking trails
OS Maps: Explore hiking trails
★3.3
GPS Waypoints Navigator | MAPS
GPS Waypoints Navigator | MAPS
★4.6
Trailforks
Trailforks
★4.4
onX Backcountry Trail Maps GPS
onX Backcountry Trail Maps GPS
★4.5