Volleyball Referee Timer for Apple Watch aids volleyball referees in timing 3+ things: warmups, timeouts, and the interval between sets. Since different rulesets and organizations use variations of these, Volleyball Referee Timer lets you choose the ruleset/organization and lets you customize your timers for matches that you are refereeing. To ensure you never miss anything important, Volleyball Referee Timer will beep (unless silenced) and vibrate to alert you to upcoming actions and display a description of those actions on the screen (such as blowing a whistle or horn).