New free Garmin app tracks caffeine levels in your blood

The third-party app enables caffeine tracking on many Garmin smartwatches (Image source: Ondřej Božek)

A new app for Garmin smartwatches not only tracks your caffeine intake but also estimates your current blood-caffeine level. This feature could help you determine the optimal time for your last cup of coffee.

Silvio Werner (translated by Zhiwei Zhuang), Published 01/26/2026 🇩🇪 🇪🇸 ...

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.

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Garmin, Caffeine Tracker

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Editor of the original article: Silvio Werner - Senior Tech Writer - 16774 articles published on Notebookcheck since 2017

I have been active as a journalist for over 10 years, most of it in the field of technology. I worked for Tom’s Hardware and ComputerBase, among others, and have been working for Notebookcheck since 2017. My current focus is particularly on mini PCs and single-board computers such as the Raspberry Pi – so in other words, compact systems with a lot of potential. In addition, I have a soft spot for all kinds of wearables, especially smartwatches. My main profession is as a laboratory engineer, which is why neither scientific contexts nor the interpretation of complex measurements are foreign to me.

contact me via: silvio39191, LinkedIn

Translator: Zhiwei Zhuang - Translator - 594 articles published on Notebookcheck since 2022

After graduating with a bachelor’s degree in environmental engineering, I moved from Singapore to Cologne in 2014 and began pursuing a career as a freelance translator. Much of my translation work focuses on science, engineering and technology. My fascination with computers and mobile electronics began when I was young. And I have fond memories reading countless tech and gaming magazines. Working with Notebookcheck gives me the opportunity to incorporate my personal interests into my professional work.

> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2026 01 > New free Garmin app tracks caffeine levels in your blood

Silvio Werner, 2026-01-26 (Update: 2026-01-26)

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