This app was mentioned in 4 comments, with an average of 7.00 upvotes
Let me link that for you: https://play.google.com/store/apps/details?id=bihsnow.com.steamwidget
Looks interesting. I have my own solution for keeping up to date on sales and I don't chat much on Steam so this isn't terribly useful for me personally, so I won't be using it, but it is slick looking.
That's really sad, and one of main reasons i built this (Widget for Steam)
https://play.google.com/store/apps/details?id=bihsnow.com.steamwidget