There's a number of dapps with Android based apps. If you're looking for a general Steem app then you may want to check out Partiko or Esteem.
Partiko
https://play.google.com/store/apps/details?id=io.partiko.android&hl=en_US
Esteem
https://play.google.com/store/apps/details?id=app.esteem.mobile
I’m apple
Partiko
https://itunes.apple.com/us/app/partiko/id1401033260?mt=8
Esteem
https://itunes.apple.com/us/app/esteem-mobile/id1141397898?mt=8
Ohh, tysm!
You might also like Steepshot. It's a lot like Instagram but is based in Steem. I used to use it a lot but since jumping into Share2Steem I don't have as much of a need.
https://itunes.apple.com/us/app/steepshot/id1288494457