Cost: Free, with in-app purchases
I discovered this addictive “waiting game” after watching our students staring, seemingly blankly, at their iPads, ready to spring when they see an opening. It might look like something out of The Manchurian Candidate, but while the central wheel twirls around, the player must gauge the perfect moment to add another spoke in the spaces remaining without knocking any of the existing elements. Any error sends you back to the adding all of the elements all over again.
Like Dots, the underlying gaming concept behind Aa couldn’t be simpler. Any gesture on the screen inserts a spoke at the bottom of the spinning radius. But, by adding an element as you advance through each level, it quickly builds into a challenge as it becomes more difficult to insert a new one given the scant room available. Avoiding the impulse to “fire” spokes in a rapid-fire manner is the real test of patience and hand-eye coordination.
Aa is free, but the ability to skip and unlock levels are available as in-app purchases, as is a nominal charge to remove ads, which appear every few levels (just when a break can be welcome). The highest level you’ve mastered appears numerically in the center of the wheel, providing an immediate talking point based on skill.
General Adaptive Apps has a range of similar games using different shapes and objectives, but this seems to be their most popular incarnation. I think it might appeal to novice gamers getting new devices over the holiday, too.