The precision interval timer built for fighters who demand more from their training.
RoundBlitz is a boxing, Muay Thai, and HIIT interval timer for iPhone and Apple Watch. It runs your rounds with authentic bells and end-of-round warnings — and its standout feature lets you control the timer hands-free with camera gestures, so you never break rhythm mid-round, even with gloves on.
Your camera reads hand signs, so you can run the timer mid-round without touching the screen — even with gloves on.
Fully customizable in Settings → Gesture Control. Pick your hand, map your signs.
Every feature, from your first round. No paywalls, no locked toggles.
Control the timer from your wrist. Start, pause and skip rounds without reaching for your phone — glance-able round and time, right where you need it.
Round bells, buzzers and whistles. Plus a countdown bell for your final 5 seconds. Tap any sound to preview it.
Build and save your own round configs — rounds, work, rest, warning cues and prepare time. Yours forever.
A big, high-contrast timer you can read across the room, with color-coded phases for fight, rest and warning.
Prop your phone on a bench or shelf and read the count from anywhere in the room.
Finish strong and see it: rounds completed, total fight and rest time, estimated calories, and a full timeline of your session.
Load a battle-tested preset, or build your own in seconds.
No subscriptions, no locked features. One purchase unlocks the whole app — on iPhone and Apple Watch.
Download RoundBlitz and run your next session by the round.
Download on theApp Store