I love this app- it's my main go-to portfolio manager for crypto.
Although I like the coin voting I wonder if entire exchanges shouldn't just be listed? There are some obvious coins such as Monero and Bytecoin (BCN- not to be confused with it's namesake BTE) missing- and many new coins on Poloniex that are getting popular- why not just add the entire exchange?
Additionally, you should absolutely add the coins on masterxchange.com- it's a main trading exchange for mastercoin and maidsafe (if not the only exchange?).
Anyway, great with developing and updating the app!