EVE Droid is pretty awesome. It was created by Alexander Hansen. I had never heard of it and like I said, I wasn't really looking for anything, it just happened.
The API entry section is really easy and it links you to the correct pages and then installs the API easily. Visually the app is very nice. It is neat, cleaned and and organized. The layout is very nice. All in all, this is one of the best character monitors I have seen. The email part is awesome and it even tells you when your account subscription ends and how many hours played. I am at 3225 hours.. It doesn't have all the buttons that Aura has, but I never really used them anyway. You can do fittings and there is an item database. I doesn't have a skill planner, but I don't remember if Aura did either.
Anyway, check it out [get it on Google Play] and as always fly safe-ish.