Using an app to track playing time and field positions makes it easy to balance the amount of time each player gets.

Coaches agree that the best app is  [[https://play.google.com/store/apps/details?id=com.gametimes&hl=en_US|SubTime app]]. 

iPhone users might try [[https://apps.apple.com/us/app/coachs-clock/id455525937|Coach's Clock]]