Testic - Testosterone Tracker - Daily testosterone insights for energy & performance

Hey Product Hunt 👋 Testic started with a simple frustration: some days I'd wake up sharp and unstoppable, other days completely flat — and I had no idea why. I tried blood tests, but they're a single snapshot. Your testosterone doesn't sit still; it rises and falls all day, shaped by your sleep, training, stress, and even how much daylight you get. So I built Testic to make that invisible rhythm visible — without needles or lab visits. It uses your age and Apple Health data (sleep, HRV, activity, daylight, workouts) to build a personal testosterone baseline, then estimates how your habits push you above or below it, hour by hour. Every shift comes with context: which factor caused it, and what you can actually do about it. There's also an AI hormone coach that reads your live Health data and answers real questions — "why am I tired today?", "what should I eat before training?" — with science-backed, personalized answers instead of generic tips. The hardest part was the science. Early versions threw raw numbers at people and it felt clinical and useless. The real shift came when we stopped showing data and started explaining the why behind it — that's when testers said it finally clicked. Everything is built on peer-reviewed endocrine research, and your health data never leaves your device. To be clear: Testic is a wellness tool, not a medical device — it doesn't diagnose anything or replace a doctor. I'd love your honest feedback, especially from anyone who tracks their health data: what would make this genuinely useful in your daily routine? And what habits do you think move the needle most?