Yatzy Arena is head-to-head Yatzy: two players, three rolls each per turn, and a scorecard that has to be filled whether your dice cooperate or not.
Playing against someone changes the calculus. A safe category you'd normally hold back becomes worth spending when you can see you're behind.
Two, playing head to head with the same three-rolls-per-turn structure.
It makes score position matter — when you're behind, chasing a high-variance category is right; when ahead, taking the guaranteed points is.
Yes — tap to roll and hold. Nothing to install.