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Fit4i
The AI coach that plans today's workout from your recovery
Fit4i is an AI personal trainer, not another workout logger. Every morning it reads your sleep & HRV (Apple Watch/Polar — or a 10-sec check-in) and builds today's session: exercises, sets, working weights. Real periodization, deloads and adaptive nutrition included.
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?
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About Fit4i on Product Hunt
“The AI coach that plans today's workout from your recovery”
Fit4i was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #141 on the daily leaderboard. Fit4i is an AI personal trainer, not another workout logger. Every morning it reads your sleep & HRV (Apple Watch/Polar — or a 10-sec check-in) and builds today's session: exercises, sets, working weights. Real periodization, deloads and adaptive nutrition included.
Fit4i was featured in iOS (110.6k followers), Health & Fitness (83.1k followers) and Artificial Intelligence (475.9k followers) on Product Hunt. Together, these topics include over 180.8k products, making this a competitive space to launch in.
Who hunted Fit4i?
Fit4i was hunted by Mykola Tereshchenko. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Fit4i stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Mykola Tereshchenko