Pax Britannica for Android is a port of the open-source game of the same name. Marketed as "the one button strategy game," Pax lives up to its word. Players take control of an underwater factory ship that is locked in combat with another ship of similar function.
Each ship it outfitted with a dial which allows it to spawn individual ships. This is accomplished by a player pressing and holding their finger on their assigned section of the screen: the needle on the dial unwinds clockwise, and each quadrant of the dial spawns a different ship.