Caffeine Tracker is a Garmin Connect IQ widget for logging caffeine intake and estimating how much caffeine is still active in your body over time.
It helps you see your current caffeine level, understand when it is likely to wear off, and make better decisions about late-day caffeine and sleep.
Main features
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Quick caffeine logging directly on the watch
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Real-time estimated caffeine level
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Caffeine decay graph
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Sleep-safe prediction / last drink time recommendation
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Automatic background updates
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Glance support
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Watch-face complications / Complications API support
- caffeine half-life wizard on the companion website to help estimate your personal half-life setting
Premium features
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Adjustable caffeine half-life
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Custom sleep-safe caffeine threshold
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Custom drinks and caffeine amounts
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Advanced daily statistics
Examples of daily statistics
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Total caffeine intake
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Time under stimulation
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Time of last caffeine intake
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Time when caffeine dropped below the sleep threshold
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Today vs. yesterday comparison
How it works
The app uses a practical estimation model based on:
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logged drinks
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body weight
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selected half-life
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chosen thresholds
It does not measure caffeine directly.
It provides an estimate designed to be practical and useful for day-to-day decisions.
Links
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Store: https://apps.garmin.com/apps/b9325e27-582a-4aeb-a3a5-963097915714
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Website: https://www.caffeinetracker.app
Screens:
Feedback
Feedback, feature requests, and bug reports are welcome.
If you are reporting an issue, please include:
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watch model
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firmware version
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app version
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short description of the problem
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steps to reproduce, if possible