For many athletes and professionals, caffeine is a vital tool for performance, yet managing its lingering effects can be a delicate balancing act. While Garmin has long offered basic lifestyle logging, a new third-party application called Caffeine Tracker is taking things a step further. Developed by Ondřej Božek, this tool doesn’t just record your coffee intake—it estimates how much of that caffeine is still circulating in your system.
Real-Time Physiology on Your Wrist

Unlike standard logging tools that simply count cups of coffee, Caffeine Tracker utilizes a specialized widget to provide a more scientific overview of your stimulant consumption. By factoring in your body weight and the biological half-life of caffeine, the app calculates an estimate of your current blood-caffeine concentration.
Users can view this data through a simplified “quick-view” interface or dive into a detailed chart that visualizes the rise and fall of caffeine levels throughout the day. This is particularly useful for those who want to “time” their caffeine peaks for workouts or ensure their levels are low enough for restful sleep.
Seamless Integration and Device Support

One of the most significant advantages of this app is its independence from your smartphone. You can log various beverages—ranging from a standard espresso to a bottle of cola—directly on the watch face.
The software is designed to be compatible with a broad spectrum of the Garmin ecosystem. Whether you are wearing a high-performance Forerunner or a rugged Fenix, the app integrates smoothly into the existing interface, making it a convenient addition for daily wear.
Free Access vs. Premium Insights

While the core functionality of Caffeine Tracker is available for free, a one-time upgrade fee of approximately €4.90 ($5.80) unlocks a suite of advanced features. These premium options allow for a much higher degree of personalization, including:
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Adjustable Half-Life: Customize how fast your body processes caffeine (useful for those with high or low tolerances).
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Threshold Alerts: Set a “lower limit” notification to help you avoid caffeine consumption too close to your bedtime.
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Expanded Statistics: Access deep-dive daily data to track long-term consumption habits.
Why This Matters for Garmin Users
The release of this app highlights a growing trend in the wearable market: the shift from tracking external metrics (like steps) to internal biochemistry. By providing a visual representation of how a morning latte might still be affecting the body at 10:00 PM, Caffeine Tracker empowers users to make more informed decisions about their energy levels and sleep hygiene. You can get the Caffeine Tracker App from this link.
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