We play both Fortnite: Battle Royale and PlayerUnknown’s Battlegrounds (PUBG) on a 12.9-inch iPad Pro. With Fortnite, we played on iOS versus PC and console players, and in PUBG we played a 20-minute round with a friend of Macworld who was playing on an Android phone. Fortnite requires a beta signup (see below), but both games are available on iPhone as well.
PUBG Mobile on iOS App Store: https://itunes.apple.com/us/app/pubg-mobile/id1330123889?mt=8
Fortnite: Battle Royale beta signup for iOS: https://www.epicgames.com/fortnite/en-US/mobile/sign-up