Surge: Interval & Boxing Timer
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Description
The interval timer that shows you what your heart did every round.
Big, color-coded, readable from across the gym. Voice cues over your music
with the screen locked. And after every workout: heart rate, calories, and
recovery — round by round, straight from your watch.
BUILT FOR EVERY FORMAT
Boxing rounds, Tabata, HIIT, EMOM, AMRAP — one tap to load
Block editor: work, rest, warm up, cool down — any structure you want
Repeat groups: build circuits and repeat them ×2 to ×99
Quick Start: work/rest × rounds in two taps
MADE FOR THE GYM FLOOR
Massive countdown digits you can read from meters away
Green means work, blue means rest — full-screen color coding
Voice coach announces what's next; beeps count you down
Plays over your music and keeps running with the screen locked
YOUR HEART, EVERY ROUND — WITH ANY WATCH
Workouts saved to Apple Health automatically
Heart rate & calories from your watch, right
Recovery: how fast your heart rate drops between rounds — the number
coaches actually care about
Round-over-round drift shows you when your engine fades
Pro: the full per-round breakdown and chart
WORKS WITH ANY SMARTWATCH
Wrist alerts at every interval — Apple Watch, Garmin, Samsung, Pixel & more
Your watch tracks the workout; Surge cues th