Some things to correct:
-The amount of nxt is superposed with the date and time of the transaction
-The amount in green only shows the guaranted balance "seems" while in red, shows the available balance "maybe works well this way, but seems unnecesary, most users wont care if their balance already have 1440 confirmations"
-And same suggestions as other members: Add account ledger in order to see dividends and all other stuff
-Maybe also make transactions clickables and open it in a blockexplorer in the web browser "I suppose is easier than give all the information directly inside the app, also this would be even better"
-When I tried to introduce the account id, I coppied from mynxt blocekplorer "which is a big bold letter" and the app didn't recognized it until I copied in another letter format
-Also, if I try to introduce the account manually, I need to do it in one step, because if I switch to the browser or other app in my phone, when I come back to your app, the account input box is empty again, and my memory is very bad for memorize the whole account

In other aspects, it's fine, so keep improving it!