Fortnite or Fortnite Battle Royale, is the most popular game in the world as of late and you can play it on your iPhone or iPad to waste time. It will soon be on Android, but there is no firm release date.
Fortnite is a free to play Battle Royale game. You start with no weapons or armor and collect those from buildings as you take on 99 other players to see who can be the last one standing. In addition to fighting, you can also build forts, protection, walls and other structures to get to a better vantage point.
Fortnite is free to play, but you can buy the Fortnite Season 4 Battle Pass if you want to unlock extra rewards as you play.
Download Fortnite for iPhone.