01
What is the difference between HIIT and Tabata?
HIIT alternates high-intensity efforts with recovery. The familiar 20/10 format follows Tabata-style timing; the original Tabata study used exhaustive cycling at a prescribed intensity. Exercise choice and intensity determine the training stimulus, so a work-rest ratio alone does not make a session HIIT.
02
What can I customize about the sound cues?
Choose beep or spoken remaining numbers, then set a single cue, countdown, or repeating pattern. Add up to five cue sequences per phase, each with its own timing. Separately, set phase-change audio to beeps, spoken phase names such as “Work” and “Rest,” or off. Voice cues speak numbers; custom spoken phrases, exercise-name announcements, and recorded or imported sounds are not supported.
03
Does the timer include a final rest?
No. For 20/10 × 8, one set contains eight 20-second efforts and seven 10-second rests, totaling 3:50 before any Get Ready delay. Sound Cue finishes after the eighth effort. For multiple sets, Between Sets is the entire recovery after a block’s final effort; it replaces that block’s short Rest interval.
04
Does the timer work while my iPhone is locked?
Yes. An active workout is designed to keep timing and play cues when the iPhone is locked or Sound Cue is in the background.
05
Can cues play over my workout music?
Yes. Cues can play alongside other audio, and Lower Other Audio can briefly reduce its volume while a cue plays.
06
Can I save different HIIT routines?
Yes. Rename, reorder, group, and reuse workouts. The free library holds five workouts in total, including the three starter workouts; a one-time upgrade expands it to 100.