How I Built an iOS App to Fix My Coffee and Sleep Balance

It’s 10:30 PM, and I’m on a late flight out of Frankfurt. My eyes are wide open, staring at the dark cabin ceiling. The culprit? The double espresso that had felt so crucial just a few hours ago. Coffee has betrayed me again.

Sound familiar? If you’re like me, coffee is essential—not just a morning ritual, but a productivity booster, a creative muse, and yes, a simple pleasure. But there’s a flip side: sleepless nights, jittery afternoons, and a constant guessing game: “Did I have one espresso too many?”

I decided enough was enough. I didn’t want to give up coffee; I wanted clarity. How could I keep the joy of coffee without paying the nightly price?

Enter Mindful Coffee

This frustration sparked a personal project. As a technologist, data scientist, and coffee enthusiast, I started asking myself: what if there was a way to scientifically manage caffeine intake?

That’s how Mindful Coffee was born—an iOS app designed to remove caffeine guesswork, enabling mindful enjoyment of your coffee without compromising your sleep.

Who will benefit from this app?

Coffee Lovers who want to enjoy their favorite drink without sleepless nights.
Productivity Seekers aiming to optimize their energy and focus.
Health-Conscious Individuals interested in understanding how their diet affects their body and sleep.

Clarity Instead of Guesswork: The Core Features

Mindful Coffee lets you effortlessly log your caffeinated drinks and immediately gives you an estimate of when you’ll be ready for sleep. It eliminates the mental math (“Did that cappuccino push bedtime past midnight?”) and replaces it with clarity, simplicity, and confidence.

I’ve also included a „What-If“ feature—your caffeine crystal ball. Wondering about another latte at 4 PM? Mindful Coffee shows exactly how it’ll affect your bedtime tonight.

The main dashboard of the Mindful Coffee iOS app. The screen displays three main circular progress indicators against a light green background. The first, labeled "Caffeine in body," shows a value of 77 mg. The second, labeled "Total caffeine today," shows a value of 189 mg. The third, labeled "Ready for sleep," shows a time of 0:24 (Tomorrow), indicating the user will be ready for sleep in 24 minutes after midnight. — A screenshot of the Mindful Coffee app dashboard showing caffeine levels in the body, total caffeine consumed today, and the predicted time until ready for sleep.

Go Deeper with Mindful Coffee Pro

Recognizing every body is unique, Mindful Coffee doesn’t offer just one-size-fits-all guidance. With the Pro subscription, you get deep, personalized insights:

Personalized Metabolism Assistant: Understand precisely how your body processes caffeine.
Personalized Sleep Analysis: Syncs seamlessly with HealthKit to correlate your caffeine intake and real sleep data.

This means less guesswork and more targeted insight to maximize both your coffee enjoyment and restful nights.