New free Garmin app tracks caffeine levels in your blood

Garmin previously introduced its own lifestyle tracking feature for various parameters, such as the consumption of caffeinated beverages. A new tool now caters to users who want deeper insights into their intake and even an estimate of their blood-caffeine levels. Caffeine Tracker, an app developed by Ondřej Božek rather than Garmin, comes with a widget and is compatible with a wide range of Garmin smartwatches, including many Forerunner and Fenix models (Fenix 8 available on Amazon).

The app lets you log your intake of various caffeinated drinks, such as coffee and cola, directly on your watch, eliminating the need to use a smartphone. Using your body weight and caffeine’s biological half-life, it estimates your current blood-caffeine concentration and presents the data in both a quick-view format and a chart.

Caffeine Tracker is essentially free to use, with additional premium features locked behind a one-time payment of €4.90 (around $5.80). The premium version adds adjustable caffeine half-life, advanced daily statistics, and a customisable lower blood-caffeine threshold – useful for avoiding caffeine too close to bedtime.