Fit4i — AI Personal Trainer

Wake up to a workout built for you. Fit4i reads your sleep & HRV, adapts today's plan to your recovery — and coaches you through every set. 14 days of Pro free.

Fit4i is a personal training coach in your pocket. Not another workout logger — a coach that decides what you should do today, explains why, and adapts the plan to your recovery, your schedule, and your progress.

WAKE UP TO A READY PLAN Every morning Fit4i has today's workout waiting: exercises, sets, reps, and working weights — all picked for you. Tap "Why this workout?" and your coach explains the reasoning behind today's session.

YOUR WORKOUT ON THE LOCK SCREEN During a session, a Live Activity shows your current exercise, set count, and a rest countdown right on the Lock Screen and in the Dynamic Island. On iOS 17+ you can log sets without unlocking: tap Done, tweak reps, skip or extend rest — phone stays in your pocket.

IT ADAPTS WHEN LIFE HAPPENS • Only have 20, 30, or 45 minutes? One tap reshapes the session to fit. • Coming back from a break? A comeback mode rebuilds you gently — no guilt, no injuries. • Tweaked something? Tell the coach about an injury and it works around it.

REAL COACHING, NOT JUST TRACKING • Progressive overload handled for you: weights and reps advance automatically as you get stronger. • Volume periodization built on proven training science — training waves, planned deloads, and long-term progression like a professional coach would program. • After every workout: a debrief on what changed and what's next. • New to the gym? Every exercise comes with plain-language guidance on what to do.

RECOVERY-AWARE — WATCH OPTIONAL No wearable? Tap the readiness ring for a 10-second check-in — how you slept, your energy — and the plan adapts. Have an Apple Watch or Polar? Fit4i reads your sleep, HRV and resting heart rate automatically. Either way you get one clear verdict — Ready, Balanced, or Recover — not a mystery score.

NUTRITION THAT MATCHES YOUR TRAINING Daily calorie, protein and fiber targets tied to your goal — and they adapt as your weight trends. Log meals in seconds, track water, and add supplements (whey, gainer, creatine) with proper serving math. Fiber counts as you eat, and your targets recalculate when your bodyweight moves.

A QUICK SAFETY CHECK FIRST Before your first session Fit4i runs a short readiness questionnaire (PAR-Q) — a few health questions to keep training safe. It's guidance, not a diagnosis.

BUILT FOR CONSISTENCY Start in under a minute: pick a goal, answer a few questions, get your plan. Works in kg or lbs, at the gym, at home with dumbbells, or with just your bodyweight.

FIT4I PRO Free forever: build your program, log every workout, and your weights advance automatically as you get stronger — plus full nutrition, water, weight and supplement tracking. Your first 14 days of Pro are free, then Pro adds the smart layer: AI program generation, training periodization and planned deloads, recovery-driven day adjustments, and calories that adapt to your weight trend. Subscription is auto-renewable; cancel anytime in Settings.

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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.