{"id":1703,"date":"2026-01-27T09:20:40","date_gmt":"2026-01-27T09:20:40","guid":{"rendered":"https:\/\/www.batteryone.co\/blog\/?p=1703"},"modified":"2026-01-27T09:20:40","modified_gmt":"2026-01-27T09:20:40","slug":"new-caffeine-tracker-app-brings-blood-caffeine-estimates-to-garmin-smartwatches","status":"publish","type":"post","link":"https:\/\/www.batteryone.co\/blog\/archives\/1703","title":{"rendered":"New \u201cCaffeine Tracker\u201d App Brings Blood-Caffeine Estimates to Garmin Smartwatches"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.batteryone.co\/search?keyword=Garmin&amp;post_type=product\">Garmin<\/a>&nbsp;already offers basic lifestyle tracking for metrics such as caffeine consumption, but a new third-party app provides more detailed insights, including estimated blood-caffeine levels. Called Caffeine Tracker, the app was developed by Ond\u0159ej Bo\u017eek and includes a widget for quick access. It supports a wide range of Garmin smartwatches, including many Forerunner and Fenix models.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"399\" src=\"https:\/\/www.batteryone.co\/blog\/wp-content\/uploads\/2026\/01\/Caffeine-Tracker.png\" alt=\"\" class=\"wp-image-1704\" srcset=\"https:\/\/www.batteryone.co\/blog\/wp-content\/uploads\/2026\/01\/Caffeine-Tracker.png 400w, https:\/\/www.batteryone.co\/blog\/wp-content\/uploads\/2026\/01\/Caffeine-Tracker-300x300.png 300w, https:\/\/www.batteryone.co\/blog\/wp-content\/uploads\/2026\/01\/Caffeine-Tracker-150x150.png 150w, https:\/\/www.batteryone.co\/blog\/wp-content\/uploads\/2026\/01\/Caffeine-Tracker-301x300.png 301w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure>\n<\/div>\n\n\n<p>Users can log caffeinated drinks such as coffee or cola directly from their watch, without needing a smartphone. Based on body weight and caffeine\u2019s biological half-life, the app estimates current blood-caffeine concentration and displays the data in both a simple overview and a detailed chart.<\/p>\n\n\n\n<p>&gt;&gt;&gt;<a href=\"https:\/\/www.batteryone.co\/detail\/1747398\/361-00139-00\">New 226mAh\/0.87Wh 361-00139-00 Replacement Battery for Garmin Forerunner 255<\/a><\/p>\n\n\n\n<p>Caffeine Tracker is free to use, with optional premium features available through a one-time purchase of \u20ac4.90 (about $5.80). The paid version adds adjustable caffeine half-life settings, advanced daily statistics, and a customizable lower caffeine threshold to help avoid late-day intake that could disrupt sleep.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Garmin&nbsp;already offers basic lifestyle tracking for metrics such as caffeine consumption, but a new third-party app provides more detailed insights, including estimated blood-caffeine levels. Called Caffeine Tracker, the app was developed by Ond\u0159ej Bo\u017eek and includes a widget for quick access. It supports a wide range of Garmin smartwatches, including many Forerunner and Fenix models. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[128],"class_list":["post-1703","post","type-post","status-publish","format-standard","hentry","category-news","tag-garmin"],"_links":{"self":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/comments?post=1703"}],"version-history":[{"count":1,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1703\/revisions"}],"predecessor-version":[{"id":1705,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1703\/revisions\/1705"}],"wp:attachment":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/media?parent=1703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/categories?post=1703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/tags?post=1703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}