If anyone wants a mostly-brainless collecting-type mobile game -- the sort where you collect critters to get money to upgrade the environment to get more money to collect critters -- there are two I'm in love with right now. Both free, with optional ads (and optional in-game purchases).
One is called Penguin Isle, and is all penguins (plus a few bonus critters). Optional ads get you more hearts or coins. It has similar mechanics to Abyssrium (back before it became TapTapFish and went bad and incorporated luck-based gambling-type elements) -- penguins give hearts which upgrade habitats to give gold faster, habitats generate gold to buy more penguins and new habitats, you optionally can watch an ad for either gold or hearts, and it's sort of pointless except PENGUINS.
The other is called Cat Game, and it's ... not quite like Neko Atsume, but you basically have a house of cats, with a new floor each time you level up. Feeding cats will trigger a basket delivery that's some % chance new cat and the other % chance crafting materials that can be used to craft decorations for the rooms. Each room generates coin, used to buy food or to craft things. Not much point but ridiculously cute. (If you do this one, you can go to settings > referrals and enter "izzy flp" (that's L not a one) and I'll get a key for referring you...)
One is called Penguin Isle, and is all penguins (plus a few bonus critters). Optional ads get you more hearts or coins. It has similar mechanics to Abyssrium (back before it became TapTapFish and went bad and incorporated luck-based gambling-type elements) -- penguins give hearts which upgrade habitats to give gold faster, habitats generate gold to buy more penguins and new habitats, you optionally can watch an ad for either gold or hearts, and it's sort of pointless except PENGUINS.
The other is called Cat Game, and it's ... not quite like Neko Atsume, but you basically have a house of cats, with a new floor each time you level up. Feeding cats will trigger a basket delivery that's some % chance new cat and the other % chance crafting materials that can be used to craft decorations for the rooms. Each room generates coin, used to buy food or to craft things. Not much point but ridiculously cute. (If you do this one, you can go to settings > referrals and enter "izzy flp" (that's L not a one) and I'll get a key for referring you...)