Of course we are biased, but we would love if you have a look at Cryptonaut (https://cryptonaut.org). You can track all your cryptocurrencies, watch beautiful cryptocharts and read some information about each coin, Our portfoliotrackerit is available for Android and iOS, and we recently launched our first web version: https://web.cryptonaut.org
I am going to get such an app developed for my business soon. I have found some nice software companies in Ukraine, and the guys from there will work on this app for me. Have you ever worked with such developers, guys?