HIIT Interval Timer & Tabata

Stop training blind. H11T reads your heart rate and runs the session around you — Smart Rest, AI Coach and Boxing IQ built in.

Stop training blind. Most interval timers just count down — they have no idea whether you're actually in the right zone, or whether your body's recovered before the next round starts. H11T is different: it's a smart conditioning coach that reads your heart rate and runs the session around you, not the other way round.

Train like a data-driven athlete instead of guessing:

• Smart Rest — your rest ends the moment your heart rate has recovered, not a second before or after. Fixed rest treats a warmed-up body and a gassed one exactly the same; Smart Rest doesn't (via Apple Watch). • AI Coach — generate a complete workout tailored to you in seconds. Tell it what you've got and it builds the session. • Pro Studio — design and save as many of your own protocols as you like, ready to fire up whenever you train. • Boxing IQ — proper round-based boxing timer with a ring bell and gong, plus heart-rate-driven rounds and ready-made presets (Amateur, Pro, MMA, heavy bag).

And the essentials are still free and brilliantly simple:

• Build workouts your way — customise rounds, work and rest times, add a warm-up and cool-down. • Apple Watch support — train from your wrist with haptic and sound cues. • Apple Fitness integration — automatically log calories, heart rate and activity. • Pro stopwatch — millisecond precision for runners and swimmers, ideal for intervals and time trials.

Perfect for HIIT and Tabata, fat-burning circuits, boxing and MMA conditioning, runners, swimmers, and anyone who's done with one-size-fits-all rest.

The free timer is the body. The premium tools are the brain. Stop guessing and start training smarter.

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