My suggestions

[randrei321]

The ability to view your steamwallet money without having to go to the purchase page.

The ability to view my games, track my achievements, playtime etc.
-Make it possible so users can post guides on how to complete certain achievements because i know there are many users that are addicted to achievements.

The ability to sign out.

The ability to turn the app into a "PC remote" so i can request steam to download and install games i bought from the app to my pc

The ability to trade


The ability to join a group chat

Edit: It doesn't seem to save my age and it gets annoying to re-enter it every time

I know most of my suggestions are dull most likely already suggested\planned and extremely stupid but i didn't have time to read the other topics and i wanted to do something since valve allowed me to use the app to witch i am very grateful for.
Also don't comment on my english, i hate it but i promises one day i will master it

[Mareku]

You can actually signout: Settings > Tap on your username > Signout or Change Account
But this needs to be changed. Add an arrow to the right so we know it's tappable maybe?

And the same thing is happening for me with the age setting and it's annoying indeed