Top 3 Apps by NASA 
NASA
NASA
The Official NASA app for Android
8.5
Rocket Science 101
Rocket Science 101
Build A Rocket – Launch A Mission
7.9
GLOBE Observer
GLOBE Observer
GLOBE Observer invites you to take environmental observations supporting NASA.
6.8
All NASA  Apps & Games
NASA
NASA
8.5 8K+
NASA Technology Innovation
NASA Technology Innovation
8.7 17
Rocket Science 101
Rocket Science 101
7.9 213
NASA 3DV
NASA 3DV
9.0 63
Space Station Research Xplorer
Space Station Research Xplorer
8.4 73
Satellite Insight
Satellite Insight
7.0 14
GLOBE Data Entry
GLOBE Data Entry
6.8 13
GLOBE Observer
GLOBE Observer
6.8 98
NASA Science: Plant Growth
NASA Science: Plant Growth
8.5 118
NASA Visualization Explorer
NASA Visualization Explorer
9.0 83
Sector 33
Sector 33
6.9 81
ISS Explorer
ISS Explorer
8.8 32
NASA Science: Humans in Space
NASA Science: Humans in Space
8.2 34