Shoal Thing moves around like a school of fish and likes to play.
Glide a finger across the screen and they'll scram like it's a predator. Press with two and they'll circle in like there's food around. Tap with three fingers to turn on neighbour lines and transform the individual fish into Shoal Thing.
The free version of the app lets you be a predator. The full version (available by in-app purchase) enables all three features.
Build for iOS 9.3.
Up to six family members will be able to use this app with Family Sharing enabled.