Apps like GeoExplore

Here are some great alternatives to GeoExplore by BrooksDesigns :
Rockd
Rockd
★4.1
StraboSpot Mobile
StraboSpot Mobile
★3.7
Geology Toolkit Lite
Geology Toolkit Lite
★4.3
Colorado Trail Explorer
Colorado Trail Explorer
★4.3
Rock Identifier: Stone ID
Rock Identifier: Stone ID
★4.5
Flyover Country - Inflight GPS
Flyover Country - Inflight GPS
★4.5
Geology Dictionary
Geology Dictionary
★4.5
Geology Toolkit Premium
Geology Toolkit Premium
★4.5
pLog Tablet
pLog Tablet
★4.3
Natural Atlas: Trail Map & GPS
Natural Atlas: Trail Map & GPS
★3.7
Mapit GIS - Map Data Collector
Mapit GIS - Map Data Collector
★4.0
Retrace
Retrace
★4.9
AndMeasure (Area & Distance)
AndMeasure (Area & Distance)
★4.3
Gps Area Calculator
Gps Area Calculator
★4.0
LD-Log Lite - GPS Logger
LD-Log Lite - GPS Logger
★4.2
TraveLog - Travel Journal
TraveLog - Travel Journal
★3.2