Apps like S1 Mobile Mapper

Here are some great alternatives to S1 Mobile Mapper by Service First Mobile GIS (USFS/BLM) :
Timber Hunt Maps: Hunting Land
Timber Hunt Maps: Hunting Land
★5.0
US Public Lands
US Public Lands
★3.6
Global Mapper Mobile
Global Mapper Mobile
★3.8
Hazards and Population Mapper
Hazards and Population Mapper
★4.4
MapSwipe
MapSwipe
★4.8
Locus GIS offline land survey
Locus GIS offline land survey
★3.9
Hunting Points: GPS Hunt Map
Hunting Points: GPS Hunt Map
★4.0
Map of Washington, D.C offline
Map of Washington, D.C offline
★4.5
BackCountry Navigator GPS PRO
BackCountry Navigator GPS PRO
★3.7
Mapit GIS - Map Data Collector
Mapit GIS - Map Data Collector
★4.0
BaseMap: Hunting Maps and GPS
BaseMap: Hunting Maps and GPS
★4.3
BackCountry Nav Topo Maps GPS
BackCountry Nav Topo Maps GPS
★3.8
TerraStride Pro
TerraStride Pro
★3.8
onX Offroad: Trail Maps & GPS
onX Offroad: Trail Maps & GPS
★3.6
CalTopo
CalTopo
★4.8
GPS Waypoints Navigator | MAPS
GPS Waypoints Navigator | MAPS
★4.5