Kittens is one I keep coming back to. It's long and impressively diverse, really well done overall. And it is still actively developed, though it's quite slow to change - expect a year or more between new mechanics. (I think this is entirely fine, to be clear)

The mobile port is pretty good too, functional and has some minor tweaks to make it more playable with mobile's more idle style. And the periodic check-ins to build more stuff are quick and easy - you might need a lot of them, but it doesn't waste your time or penalize you for taking longer. Nor does it really benefit from an auto-clicker, except perhaps very early on.

It is pretty slow though, and you'll have to experiment or check the wiki to figure some things out. I personally enjoy that, and I find it more figure-out-able than many of Antimatter Dimensions' challenges (which are essential to progress, and sometimes require hitting things you can't even see happening). Just don't expect to see real endgame stuff in a few days. It'll probably be months before you even see sephirots, much less as a viable target.