Caffeine Health

com.uc.caffeine
by Zapstore _@zapstore.dev

Track your caffeine. Protect your sleep. Real-time pharmacokinetic curves.

Republished from GitHub / F-Droid by the Zapstore main account.

Caffeine Health is a beautifully designed Android app that helps you understand how your caffeine intake affects your body throughout the day — and whether that late-afternoon espresso might cost you sleep tonight. Log drinks from a curated catalog, watch your active caffeine level in real time on a 24-hour curve, and get a personalized sleep forecast based on your unique metabolism. **Features:** • Real-time 24-hour caffeine curve with emoji drink markers • Personalized pharmacokinetic modeling based on age, weight, lifestyle • Sleep forecast — see if caffeine will affect your bedtime • Curated drink catalog: coffee, tea, energy drinks, soda • Barcode scanning, live or from a photo, with an optional Open Food Facts lookup • Typo-tolerant drink search and tea re-steep tracking • Drink detail sheets showing individual contribution curves • Quick actions — edit, duplicate, or delete entries • Analytics: caffeine by source, bedtime impact, and when you drink it, hour by hour • Home screen widgets, reminders, and automation via Tasker, MacroDroid or NFC tags • Material 3 Expressive design with dynamic color • Montserrat typography and haptic feedback throughout • Full dark mode support **Privacy:** • Works fully offline — all your data stays on your device • The internet is only used if you choose to look up a scanned barcode on Open Food Facts, and only the barcode number is sent • No ads, no tracking, no telemetry, no accounts • Open source (GPL-3.0) **Science:** The app uses a one-compartment oral pharmacokinetic model with personalized half-life calculation. Your caffeine metabolism is estimated from age, weight, smoking status, alcohol intake, and CYP1A2-inhibiting medications — grounded in real pharmacology.

First release: Sep 14, 2026, 6 total releases.

Most recent release: Oct 29, 2026.

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Releases

  • Oct 29, 2026 2.5.2
    ## What's new Addresses Issues #59 #58 #57 #56 #55 - **Caffeine Ring widget** – your active caffeine against your sleep threshold, right on your home screen - **Extended-release drinks** – give a custom drink a release window and it's logged gradually over that time instead of all at once - **Tolerance in Caffeine Coach** – the coach can now factor in your caffeine tolerance (opt-in, under Caffeine profile) - **Rising or falling at a glance** – the caffeine ring's wave now shows which way your level is heading - **Language settings show translation progress** – see how complete each language is before switching ## Improvements
    More…
    - Faster charts and peak-time calculations - Quick-log widgets and recent drinks now pick up changes to extended-release drinks correctly - Incomplete translations are no longer bund - Updated translations (thanks to everyone on Weblate!) **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.5.0...v2.5.2
  • Oct 15, 2026 2.5.0
    ## What's New * **Scan drinks by barcode** - tap the scan button next to search on the Add screen, or scan a barcode from a photo. Barcodes are read on your phone, with no Google services involved. A drink you haven't added yet can be looked up on **Open Food Facts**, but only after you agree, and only the barcode number is sent. Add it once and the next scan finds it straight away. #52 * **Analytics, redesigned** * The dashboard takes its own colour for each range (Today, Yesterday, 30 Days, 90 Days), and the numbers roll to their new values instead of jumping. With expressive blur on, it glows through frosted glass. * **Caffeine by source** shows the whole period as one bar split by category, with colour-blind-friendly colours and a shape for each category. Tap a part to focus on it. * **When you drink caffeine** shows your peak hour, an hour-by-hour chart (tap a bar to see the amount) and a tile for each part of the day. * **Search that forgives typos** - "expresso", "redbull" and "nescafe" now find what you meant, closest matches first. * **Count every steep** - pick the 2nd or 3rd+ steep when adding a brewed tea, and less caffeine is logged, since the leaves give up most of it the first time. #51 * **Redesigned widgets** - make them taller to fit more of your drinks, get a check mark when a drink is logged, and see how much caffeine you'll have left at bedtime. #54 * **Frosted glass** - the toolbar and Add Consumption button blur what scrolls behind them, and your log fits more drinks on screen. Prefer solid colours? **Settings → Appearance → Expressive blur**.
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    * **A quieter What's New** - after an update, Home shows a small card you can open or dismiss, instead of a sheet popping up on its own. * Updated Czech and Italian translations - thanks to Michal Várady and Flavio Bernardini via Weblate ## New permissions Both are only used when you ask for them: * **Camera** - to scan barcodes. Frames are read on the device and never saved. Phones without a camera can still install the app and scan from photos. * **Internet** - only to look up a scanned barcode on Open Food Facts, after you agree. Nothing else leaves your phone: still no ads, tracking, telemetry or accounts. **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.4.1...v2.5.0
  • Oct 9, 2026 2.4.1
    Includes everything from v2.4.0: * **Quick start times (#48)** - Now, 10 min, 30 min or 1 h ago in one tap; changing the time opens straight on the clock * **Your own "Time to finish" (#46)** - a default, per category or per drink, in Settings → Time to finish (pills default to 1 min) * **A fairer daily average (#47)** - only counts days you logged something * **Redesigned Add drink sheet** - Material 3 Expressive: haptic slider, button groups, bigger steppers, highlighted total **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.4.0...v2.4.1
  • Oct 8, 2026 2.4.0
    ## What's New * **Quick start times (#48)** - when adding a drink, pick **Now, 10 min, 30 min or 1 h ago** in one tap. Changing the time now opens straight on the clock, with the date one tap away. * **Your own "Time to finish" (#46)** - set how long you usually take to finish a drink: one default, per category, or for a single drink ("Always use for …"). Pills default to 1 min. Find it in **Settings → Time to finish**. Automation (Tasker/MacroDroid/NFC) uses these defaults too when no duration is given. * **A fairer daily average (#47)** - the average per day now only counts days you actually logged something, so days off caffeine no longer drag it down. * **Redesigned Add drink sheet** - rebuilt with Material 3 Expressive: a new thick slider that ticks as you drag, button groups for amounts and start times, bigger stepper buttons, a highlighted total and capitalised units. * Updated Czech translation - thanks to Michal Várady via Weblate ## Note for F-Droid users F-Droid skipped v2.3.3, so this update also brings everything from it: drink logging via automation (Tasker, MacroDroid, NFC), a choice of how many recent servings to show, medicines that speed up caffeine clearance, a home screen that scrolls, and new drinks.
    More…
    **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.3.3...v2.4.0
  • Sep 29, 2026 2.3.3
    Addresses Issues #41 #42 #43 #44 #45 ## What's Changed * feature(hydration): log hydration data to HealthConnect by @PaulLesur in https://github.com/ohuc/CaffeineHealth/pull/40 ## New Contributors * @PaulLesur made their first contribution in https://github.com/ohuc/CaffeineHealth/pull/40 **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.3.2...v2.3.3
  • Sep 14, 2026 2.3.2
    ## What's Changed * add Arizona Arnold Palmer 12 fl oz can by @costowell in https://github.com/ohuc/CaffeineHealth/pull/38 * made the UI adapt more towards Material 3 Expressive Guidelines ## New Contributors * @costowell made their first contribution in https://github.com/ohuc/CaffeineHealth/pull/38 **Full Changelog**: https://github.com/ohuc/CaffeineHealth/compare/v2.3.1...v2.3.2