HIIT Timer
A high-intensity interval, repeated a set number of times, separated by a low-intensity interval.
Intervals are arranged HIGH, LOW, HIGH — low intensity is the separator, so the timer always ends on a high. Want HIGH, LOW, HIGH, LOW instead? Use a circuit timer with both as exercises.
Settings
Number of Sets
How many high-intensity intervals to perform.
Start with Low Intensity
Adds a low-intensity interval before the first work interval.
Intervals
Tap any interval to open the interval editor. Empty optional intervals are skipped.
High Intensity
The work interval.
Low Intensity
The recovery interval between work intervals.
Warmup
Prepended to the timer.
Cool Down
Appended to the timer.
Common Properties
Name
How the timer is labeled in lists, including the sub-timer list inside compound timers. Blank names show as Unnamed Timer.
Activity
Tags the timer with an Apple Health activity. Required if you want completed sessions to log as workouts.
Alerts
Sound and haptic cues for interval transitions. Tap to change them. Inside compound timers, each sub-timer keeps its own alerts; rest intervals use the compound's.
Audio
Music or other audio for the timer. Tap to open the audio editor.
Allow Overrun
Tacks a count-up interval onto the end so you can keep training past the scheduled finish and still log the time. End the timer manually when you're done — otherwise Seconds keeps running in the background and drains your battery.
Color
Display color in the timer list. Defaults to the parent folder's color.
Notes
Scratchpad for anything you want to keep with the timer. URLs auto-link.
Preview
Sanity-check before you start. The Preview Bar at the top of the editor totals the duration; tap it for the full interval list.