Apps like List of rock types

Here are some great alternatives to List of rock types by Helpful Books :
Handbook of Rocks
Handbook of Rocks
★4.3
Geology Toolkit Lite
Geology Toolkit Lite
★4.3
Virtual Microscope - Minerals
Virtual Microscope - Minerals
★4.4
Geology Toolkit Premium
Geology Toolkit Premium
★4.6
Stone Identifier Rock Scanner
Stone Identifier Rock Scanner
★4.2
Rock Identifier: Crystal Stone
Rock Identifier: Crystal Stone
★4.5
Wesnap: Rock Identifier
Wesnap: Rock Identifier
★3.8
Rock identifier
Rock identifier
★3.2
Rock Identifier by Photo
Rock Identifier by Photo
★4.1
Atlas of 3D Rocks and Minerals
Atlas of 3D Rocks and Minerals
★4.4
Rock Identifier - Gemstone
Rock Identifier - Gemstone
★3.8
Rock Identifier, Stone Scanner
Rock Identifier, Stone Scanner
★4.1
Smart Mineralogist
Smart Mineralogist
★4.1
Rock Radio - Only Rock
Rock Radio - Only Rock
★4.6
Rock ID - Stone Identifier
Rock ID - Stone Identifier
★4.4
Classic Rock Music
Classic Rock Music
★4.5