I use a app called steemify which I made two post awhile back explaining it but it’s pretty simple you get notified whenever you get a upvote or comment. It also notifies you whenever you get a new follower or when you make transactions on steemit. I use a IPhone and it recently came out on android. So if you wanna go test it out and tell me what you think.
iOS app:Steemify by B Rexwinkel