I've been playing Dominations for the last three weeks. It's a strategy game from the developers of Rise of Nations. It has all that timer and currency stuff but for some reason I stick with it.
It's not just because it looks and sounds like Rise of Nations... It's more relaxed than other similar games. It feels like logging in once or twice a day is enough and missing log ins are not a big deal. I don't know what the hell they did but it's never as annoying as its peers and it also feels satisfying in bite-sized sessions. I read somewhere that their engagement and retention numbers are huge compared to other mobile games so they're obviously doing something right.
The only complaint I have is that combat could have used more direct control, like that Age of Empires mobile game.