This app was mentioned in 1 comment, with an average of 2.00 upvotes
On Android:
Orbasorb - a cute and simple little game that immediately spiked my blood pressure like I was actually fighting for my life. Made by a redditor.
2048 [the Cirulli one] - I got thisclose to 8192. I should quit already.
Backgammon Mobile - it uses the gnubg AI, which is better than 99.9999% of human players. There are a lot of reviews accusing it of cheating, ALL BY POOR PLAYERS. Let this game humiliate you if you want to learn to play at a high level.