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| The third-party app enables caffeine tracking on many Garmin smartwatches |
For millions, the morning ritual is sacred: the grind of beans, the gurgle of the machine, that first life-giving sip. Caffeine is our global fuel, but its effects are deeply personal. While fitness trackers have long monitored our steps and sleep, understanding the invisible chemistry of our daily brew has remained guesswork. Garmin took a first step by adding basic caffeine logging to its ecosystem. Now, a powerful new third-party app is taking that concept into the science lab, right on your wrist.
Enter Caffeine Tracker, a clever independent app developed by Ondřej Božek that transforms compatible Garmin smartwatches into personal caffeine monitors. Moving beyond simple logging, it aims to answer the question we’ve all pondered: “How much caffeine is actually in my system right now?”
From Espresso to Estimates: How It Works
The brilliance of Caffeine Tracker lies in its simplicity and smarts. Instead of fumbling with your phone, you log your consumption directly on your watch—a double espresso, a can of cola, even a green tea. The app then combines this intake with two key personal metrics: your body weight and the biological half-life of caffeine (the time it takes for your body to eliminate half of it).
Using this data, it runs calculations to provide an estimated real-time blood-caffeine concentration. You can see this at a glance via a widget on your watch face or dive into a detailed chart within the app to visualize the rise and fall of your personal caffeine curve throughout the day.
For a vast range of Garmin users, from Forerunner athletes to Fenix adventurers (including the latest Fenix 8, available on Amazon), this brings a new layer of biometric insight.
Premium Features for Precision Management
The core functionality of Caffeine Tracker is essentially free. However, for users who want to fine-tune their data, a one-time premium unlock (€4.90 / approx. $5.80) opens advanced features.
These include an adjustable caffeine half-life, recognizing that metabolism varies from person to person. You also get advanced daily and weekly statistics, and perhaps most usefully, a customizable lower blood-caffeine threshold. This feature acts as a bedtime sentry; set your desired cutoff level, and the app can warn you if your estimated levels are too high for a restful night’s sleep, helping you optimize your cut-off time for better sleep hygiene.
Where to Get It and What About Privacy?
As an independent app, Caffeine Tracker is not found in the Connect IQ storefront. Interested users can download it directly from its listing on the Garmin App Store.
For the privacy-conscious, the developer maintains transparency about data handling. All calculations are performed locally on the device, and no personal consumption data is transmitted to external servers. You can review the full details on the app’s dedicated Privacy Policy page.
The Bottom Line
Caffeine Tracker represents the next wave of hyper-personalized health tracking. It takes a ubiquitous substance and demystifies its impact, providing Garmin watch owners with actionable data to potentially improve their energy management, sleep quality, and overall wellness. It’s a potent reminder that sometimes, the most innovative tools for our connected lives come from passionate developers, not just the big brands.