I play TTA on my iOS devices, and notifications are smooth as butter.
I recently cajoled one of my friends whom I play TTA regularly with on BGA to pick up the app - mostly so we could play with the expansion, but also because its a much nicer client. The problem is, he doesn't get notifications at all.
A Google of the topic led to a lot of old discussion about notifications being bugged, but that included an acknowledgement they were fixed.
Now, I need to give my friend some good advice - but I don't have it on Steam, and barely use Steam, so I have no idea how notifications there work in general or how this game works with notifications in specific.
Can someone give me some advice to pass on to him? Just today he was - again - replaced by a bot in our game as he ran out of time, as he didn't know it was his turn.