I personally like coingeckko app and their widget sa phone. Simple lang siya and you can track many cryptos listed on them and pede ka pa magpush notifications if yung coin na binabantayan mo is nareach yung certain price na gusto mo. Ginamit ko siya recently lang noong binabantayan ko yung new crypto na nalist doon and nagnonotif naman siya ng price (nag aalarm din). Signing up is easy as well with just email verification required. You might add it as well sa list