Fit4i: HRV Workout Coach

Every fitness app asks what you did.
Fit4i decides what you do today — and tells you why.

Slept four hours? Today's session is already lighter — and you still don't lose the week.

NOT ANOTHER WORKOUT LOG
A log stores the past. A coach makes a decision. Every morning Fit4i has today's session waiting — exercises, sets, reps and working weights, already chosen. Tap "Why this workout?" and it walks you through the reasoning, the way a good trainer would.

IT READS YOUR RECOVERY
Connect Apple Health and Fit4i reads last night's sleep, your HRV and resting heart rate. No watch? A ten-second check-in does the same job. Either way you get one plain verdict instead of a mystery number — Ready, Balanced or Recover — and today's plan moves with it.

IT PROGRAMS LIKE A COACH, NOT A CALCULATOR
• Weights and reps advance on their own as you get stronger.
• Volume climbs in waves and backs off in planned deloads — real periodization, not "add 2.5 kg forever".
• Plateaus get spotted and worked around.
• After every session: what changed, and what happens next.

IT BENDS TO YOUR LIFE
• Twenty-five minutes instead of sixty? One tap reshapes the session — the main lift survives.
• Back after weeks off? Comeback mode rebuilds you gently. No guilt, no injuries.
• Something hurts? Report it and your program routes around it.

IT LIVES ON YOUR LOCK SCREEN
Start a session and your workout appears on the Lock Screen and in the Dynamic Island: current exercise, set count, and a rest timer that counts itself down. On iOS 17 and later you can log a set without unlocking — tap Done, nudge the reps, skip or extend the rest. The phone stays in your pocket, where it belongs.

NUTRITION THAT FOLLOWS THE TRAINING
Calorie, protein and fiber targets tied to your goal — and they shift as your bodyweight trends. Log meals in seconds, scan a nutrition label, track water, and add supplements with the scoop math done for you.

NEW TO LIFTING?
Every exercise carries plain-language cues: how to set up, what you should feel, what to avoid.

A SAFETY CHECK FIRST
Before your first session Fit4i runs a short readiness questionnaire (PAR-Q). It takes a minute. It's guidance, not a diagnosis.

COACH-LEVEL PROGRAMMING. NOT THE COACH-LEVEL PRICE.
Free forever: build your program, log every workout, and watch your working weights advance automatically — plus full nutrition, water, bodyweight and supplement tracking.

Your first 14 days of Pro are free. Pro adds the thinking layer: programs built around your goal and level, periodization with planned deloads, recovery-driven daily adjustments, and calories that adapt to your weight trend. The subscription renews automatically; cancel anytime in Settings.

Works in kg or lbs — at the gym, at home with dumbbells, or with nothing but your bodyweight.

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Learn more: https://fitai-web.pages.dev

Fit4i provides general fitness guidance and is not a medical service. Consult a physician before starting any exercise program.