Airship War: Armada

Airship War: Armada is one of the Shooting games here that asks for no download and no sign-up. Designed around touch input, and comfortable on a small screen. Catalogued as 1 player, 3d, action, air, aircraft.

It is drawn for a tall screen, so it fills a phone held upright rather than a wide monitor. Free to play in the browser, with no install step between you and the first round.