Garmin users already have access to basic lifestyle tracking features, including options for logging caffeinated drinks. Now, a new smartwatch app called Caffeine Tracker takes that idea much further, giving wearers a clearer picture of their caffeine intake and even an estimated blood-caffeine level throughout the day.
Caffeine Tracker is created by developer Ondřej Božek (not Garmin), and it’s designed to run right on your wrist. The app supports a broad selection of Garmin smartwatches, including many popular Forerunner and Fenix models, making it a practical add-on for runners, gym-goers, shift workers, and anyone trying to manage energy highs and crashes more intentionally.
What makes the app stand out is how easy it is to log caffeine without pulling out your phone. You can record different caffeinated beverages directly from the watch—think coffee, cola, and similar drinks—then immediately see how that intake may be affecting you. Instead of offering only a simple count of cups or milligrams, the app estimates your current blood-caffeine concentration using your body weight along with caffeine’s biological half-life. That estimate is shown in a quick-view screen for fast checks and also displayed in a chart for a clearer look at trends over time.
The app is free to use at its core, which makes it easy to try. For users who want more control and deeper stats, there’s a premium upgrade available via a one-time payment of €4.90 (about $5.80). The premium features include an adjustable caffeine half-life, more advanced daily statistics, and a customizable lower blood-caffeine threshold—particularly helpful if you’re trying to avoid caffeine too close to bedtime and want a more personalized cutoff point.
For Garmin smartwatch owners looking to fine-tune daily performance, reduce late-day stimulation, or simply understand how caffeine builds and fades in the body, Caffeine Tracker offers a more detailed and watch-first approach to caffeine tracking than basic logging alone.
