I use the blockfolio app. Also I use coinmarketcap when working with the computer. And I follow in a telegram a couple of channels that publish the latest news about crypto. It helps me keep abreast of important events.
For me, CoinMarketCap interface is the best one: everything becomes clear when you open the site: the graphs, red and green marks, etc. I used other services as well, but no one of them seemed to be better than CMC.