I know about blockfolio.io which is actually a mobile app where you can track your all crypto portfolio and you can also set different price alert for coins you are holding/not holding. You also don't have to go through registration or anything like that, no email required.
Anyway thanks for sharing this one..
Im not a big fan of this "app for everything" thing. So i think messenger notifications work better as it a chat with one contact and you get all of the alerts in one space.
But some people love their apps so blockfolio is great for that i agree