I'm trading on Bittrex. I input the values for each trade into Cryptocompare so I can get an idea of how well I'm doing. However, since most of these coins are only traded with bitcoin, when bitcoin goes up, the theoretical value of the coin goes up. I can't get my head around this. The best way I've found so far is when I let Gunbot run (the automated buying/selling app) in Bittrex it constantly buys and sells (in btc) so I can look at my total btc to give me an idea of how well I'm doing.
How are you keeping track?
I also use BlockFolio on my phone, and CryptoCompare on the desktop. At least for now, I think BlockFolio is the best by far! I am using it for several month and I can't complain.
It depends on what you want, there are some apps that import your portfolio from the exchanges or wallets.