MultiTimer
MultiTimer was an app that let you run multiple timers simultaneously. Run a Pomodoro timer and a GTD “two-minute rule” timer simultaneously. Time cooking multiple dishes. Even if you only need one timer at a time, it was convenient to have different time lengths preset and ready to go at the flick of a finger.
MultiTimer was easy to use. Simply slide a slider all the way to the right to start the timer running, or slide part-way across for a shorter time.
You could tap the arrow next to each timer to customize its length, ring sound, and ticking.
You could have up to 64 timers running at once.
MultiTimer was withdrawn from the App Store because there’s no way for a third-party app to reliably make an alarm sound with the ringer switch off. This turned out to be a fatal flaw.