These are Android apps i can recommend. Maybe they are available for iOS too:

Besides NASA: Try European Space Agency (ESA)

There's "European Space Agency (ESA)TV" News app about ESA

There are some apps that give information about specific Satellites and their data:

ESA Cryosat

ESA Aeolus

Copernicus Sentinel

ESA Heritage Missions

For Rocket launches:

Next Spaceflight

Space Launch Now

For Stargazing and Satelitte-Tracking:

Heavens Above

Sky Map

ISS on Live

Satellite Tracker