Caffeine Lens : Your caffeine, in focus. ☕ Caffeine Lens helps you track what you drink and understand how much caffeine is still in your body. ☕ Track 500+ drinks 🧠 See estimated caffeine remaining 📊 Monitor intake, limits & trends 😴 Understand caffeine and sleep 💧 Set hydration reminders ☁️ Sync your data across devices Built around one simple question: “I had coffee a few hours ago. How much caffeine is still in me?” Track. Understand. Balance.

I built Caffeine Lens because I wanted an answer to a simple question: “I had coffee a few hours ago, how much caffeine is still in my body?”
Most caffeine trackers focus on how much you consume. I wanted to go a step further and make the "remaining caffeine" easier to understand, while keeping the experience simple and calm.
This started as a small side project and evolved into a full caffeine tracker with 500+ drinks, caffeine decay estimates, sleep insights, trends, hydration reminders, and cloud sync.
I’m launching it on Product Hunt to get feedback from people who drink coffee, tea, or energy drinks regularly. What’s the one thing you’d want a caffeine tracker to tell you?
I’d genuinely love your feedback, good or bad.