Hey Product Hunt! 👋 Solo dev here. I built Fit4i because every fitness app I tried gave me the same static plan whether I slept 8 hours or 4, whether I was fresh or wrecked from yesterday. Fit4i works like a real coach: 🧠 Every morning it decides what you should do today — exercises, sets, reps, working weights — and explains WHY (tap "Why this workout?") 💤 It reads your sleep, HRV and resting heart rate from Apple Watch or Polar. No wearable? A 10-second check-in works too. You get one clear verdict: Ready / Balanced / Recover. 📉 Bad night → lighter session. Coming back from a break → comeback mode rebuilds you gently. 📈 Progressive overload, training waves and planned deloads are handled automatically — real periodization, not a random workout generator. 🥗 Nutrition targets (calories, protein, fiber) tied to your goal, adapting as your weight trends. Free forever: program builder, workout logging, auto-advancing weights, full nutrition tracking. Pro (14 days free) adds the smart layer: AI program generation, periodization, recovery-driven adjustments. I'd love brutal feedback — especially from anyone who's bounced off fitness apps before. What would make you trust an AI coach?

Fit4i

The AI coach that plans today's workout from your recovery

The AI coach that plans today's workout from your recovery