If you own several different cryptocurrencies you probably find it challenging to keep track of the total value and performance of their aggregated value.
Some wallets, such as Jaxx and Exodus, support a handful of the most popular crypto-currencies but not useful if you own steem, for example. Furthermore, if you simply want to track your investment without worrying about wallet security, it might be worth checking out one of the following services.
CryptoCompare.com
It's easy to setup. It supports a large array of fiat and crypto currencies. Displays various statistical performance data overtime and updates in real time (no need to refresh page).
CoinTracking.info
Similar to CryptoCompare but has more detailed info. Design is a little less slick and has no real time updating (you must refresh the page).
And the great thing is, both of them support EUR, GBP AND Steem so you can keep track of all your crypto gains in one place : )
I'm sure there are many more alternatives out there (for desktop and mobile) but these are the two I am trying out and enjoying.