VR Battle is a helicopter battle game. Shoot approaching helicopters and survive as long as possible. Good graphics but the gameplay is a little, meh..
VR Tank is a tank training game where you shoot targets that are appearing around you. Shoot as many as you can along the track.
Both games are well made graphical wise but the gameplay could be better. So this is not fully recommended by me. The apps can be purchased separately for $0.99 and $1.99 but there is a bundle for both for $1.99 as well.