Surge: Interval & Boxing Timer

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