Just downloaded the app and I really love it! I was using Mybitcoins and Mylitecoins windows app but I will give your's a try!
Here is my suggestion list:
-Would love to be able to add more panels than 4.. is unlimited possible?
-Change the background to transparent instead of white..
-As others suggested, if we could enter the amount of coins we have so it calculates the value of all our altcoins it would be fantactic!
-Also, can you add Dogecoin, Diamondcoin and Worldcoin plzzzzz?
Keep up the good work!!