This app was mentioned in 2 comments, with an average of 1.50 upvotes
It is hard, each turn feels like a chess turn with all that spatial thinking. But then brain adapts, abd you can't lose anymorr.
And yea, Quadrium on Google Play.
In case anyone's interested, this game's name is Quadrium, and it's available in Google Play. It's free and has no ads.