I use the Amazon cloud for the PC but I haven"t tried to use it from my phone. My wife uses it from her Fire, but it was designed for that.
Mighty Shopper, Tricoder, Facebook, Linkedin, Twitter, Power Search, Reversi, Ebay, some soundboards..
She likes it a lot. No, that's not quite correct. She LOVES it. I'm not even sure she has read a book on it yet. I fall asleep earlier than she does- I get up at 4 a.m.- and when I call it a night, she is usually surfing the net, playing games or watching a movie on it.
I adore Dropbox, plain and simple. For a student/clinician, it's insanely valuable- I can keep copies of all my study guides and materials online, print a few pages a day to read on rounds, and not worry about carrying a flash drive. Anybody wants to try it, drop me a line- I'll send a referral. Helps get you set up and gets me an extra quarter gig of space.
Send Casey a private message and let him get the extra free space for the referral .... I am sure he needs it more than I do...