This app was mentioned in 4 comments, with an average of 7.50 upvotes
I have mixed opinions too. The idea/concept is good, but most are too pay to win. They also regularly hit the sour spot of "too active to have fun idling" and "too idle to have fun being active".
I found that turret fusion idle (https://play.google.com/store/apps/details?id=com.sharkjump.turretfusion&hl=en) and castle fusion idle (https://play.google.com/store/apps/details?id=com.sharkjump.castlefusion&hl=en) were more decent than most, in that they were balanced enough to not gate you into paying, but the problem was kinda there even in them.
Have anyone tried it? I've downloaded this morning and then I'm playing for a few minutes.
It reminds a bit that Evolution games, by Tapps, but with a tower defense touch.
Here's the link for the Android version also https://play.google.com/store/apps/details?id=com.sharkjump.turretfusion&hl=pt_BR
Ive been playing Turret Fusion over the last week.
It has a bit of a different mechanic - worth a try.
If you're alright with mobile then there's this https://play.google.com/store/apps/details?id=com.sharkjump.turretfusion&hl=en_GB