Zyno - Your AI Fitness Buddy

Daily readiness from your Apple Watch. AI coach that actually knows your training. Workouts, meals, water & all in one app. Sign in with Apple to start.

Zyno is the fitness app that learns you.

It pairs daily readiness scoring (HRV, sleep, resting heart rate from your Apple Watch) with a built-in AI coach that actually remembers your goals, your split, and how you've been training. No generic plans. No counting reps in your head.

DAILY READINESS, DONE RIGHT Wake up and Zyno already knows whether you should push it or pull back. Your readiness score blends HRV trend, resting heart rate, and last-night sleep — all from Apple HealthKit, no extra wearable required.

A REAL COACH IN YOUR POCKET Tap Coach Z anytime. Ask "Why has my bench stalled?" or "Plan tomorrow for me" — get back a thoughtful, personalised reply in seconds, streamed live like ChatGPT. The coach sees your last meal, your most recent workout, and your current readiness. It doesn't guess.

TRAIN ANY WAY YOU LIKE Six battle-tested splits ready out of the box: Full Body, Upper / Lower, Push / Pull / Legs, Bro Split, Arnold Split, and the classic Chest+Tri / Back+Bi / Legs+Sho rotation. Or build your own — Zyno will keep your label and structure across the whole app.

LIVE WORKOUT TRACKING Hit start, see your session in the Dynamic Island. Log a set with one tap, get rest-timer haptics, and the iOS Live Activity keeps your reps + weights on the Lock Screen so you can train phone-down.

NUTRITION + HYDRATION, AUTO-CALIBRATED Protein and water targets scale with your weight and current goal (cut, bulk, recomp, maintain). Quick-add buttons for the meals you eat most. Streak tracking for the days you nail it.

WIDGETS THAT ACTUALLY HELP Add the Quick Log widget to your Home Screen and start a workout in one tap from Lock Screen, log 250 ml of water without opening the app, or jump into the coach. Plus a readiness ring complication for at-a-glance morning check-ins.

PRIVACY-FIRST HealthKit data stays on your device — Zyno reads what it needs, computes your readiness locally, and only uploads what you log (workouts, meals, water). Sign in with Apple if you want zero email tracking.

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REQUIREMENTS iOS 17 or later. Apple Watch is optional but unlocks daily readiness scoring (Series 4 or newer recommended for HRV).