Caffeine + sleep tracker for coffee lovers who can't fall asleep

Let's be honest — coffee enthusiasts are masters of self-deception. They're fully aware that caffeine wrecks their rest, yet that 2 PM cold brew keeps finding its way into their hands. Come midnight, they're lying there wide-eyed, gazing at the ceiling in bewilderment. That 4 PM matcha? Still coursing through their system. The post-lunch espresso? Buzzing along for another six hours. With a half-life of 5-6 hours, caffeine means roughly a quarter of your afternoon cup remains in your blood when you finally try to sleep. Brew Clock bridges the gap between your drinking habits and your sleep outcomes. You record every coffee, tea, and energy drink consumed during the day, and the app reveals exactly how each beverage impacted your rest that evening. Over time, it maps your individual caffeine metabolism and delivers a tailored cutoff time customized to your body's rhythms. For the MVP, keep things straightforward: build a clean logging screen where users enter the beverage type, quantity, and timestamp. Pull sleep metrics from Apple Health or Oura. Perform basic correlation math and present a visual chart comparing caffeine consumption against sleep quality. Recruit 50 detail-obsessed early users from r/coffee and r/sleep — people who already track manually and won't sugarcoat their feedback. After the correlation engine proves itself, introduce personalized cutoff suggestions and timely nudge notifications. The free tier hooks users with fundamental tracking and straightforward correlations. Premium runs $2.99/month or $29.99/year and opens up what people actually want: in-depth caffeine-sleep correlation charts, individualized timing guidance, proactive reminders ahead of your cutoff window, and third-party integrations. Growth comes from targeting the intersection of coffee culture and sleep optimization — two enormous, deeply passionate communities. Once you've locked in that daily habit, expand into a comprehensive sleep-lifestyle optimization platform. Layer in alcohol monitoring, screen time analysis, meal timing patterns, supplement tracking — essentially anything that influences how well you sleep.

What you get with the full dossier