I have been using coinmarketcap for ages now, several years ago, blockfolio was the number one app for tracking cryptocurrencies and prices and also tracking and management of portfolio, but the app was later on turned into an exchange, and I moved to coinmarketcap.

Coinmarketcap is not the best for this, but I really do not consider tracking and management of my crypto portfolio as that important, infact, I am even planning on deleting everything, because I've discovered that tracking the performance of my crypto portfolio is really distracting, most especially in times when the market is facing a huge volatility, I hardly focus on any thing else other than watching my portfolio, and I hate it.