I love mythology, I’ve been studying it all my life. Here are some apps for becoming more familiar with Greek mythology.
Greek Mythological Creatures
Very cool compendium of Greek mythological creatures!
Greek And Roman Mythology
Very compact information source on Greek and Roman mythology.
For .99 here is a general primer on Greek mythology complete with photos and supporting links.
Greek and Roman Mythology
You get what you pay for. For 9.99 get the best textbook-like app on Greek and Roman mythology on Android. Great for students.
This app has info in encyclopedia format about Greek Gods, Goddesses, Myths, Heroes, and much more.