Coffee Roasting Log & Curve

Home Roaster Chart & Cupping

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Log bean temp, tap first crack, and see the curve draw itself. Roasts, lots, origins, and cup scores in one private, offline notebook. Start the timer, log bean temp as it climbs, tap the moment you hear first crack, and Drupe draws the curve. It is the roast log for home coffee roasters who want to know why this batch tasted better than the last one. Most roasting apps are built for a shop with a probe wired into a drum. Drupe is built for a popcorn machine, an air roaster, or a small drum on the stove: you read the thermometer, type the number, and the chart takes shape while the beans are still moving. Every roast is tied to the lot it came from, the origin that lot came from, and the cup score you gave it afterwards. WHAT YOU GET • A live temperature curve for every batch, with first and second crack marked as dashed lines you can compare across roasts • A chime and a haptic pulse the instant you tap first crack, so your eyes stay on the beans, not the screen • Development percentage calculated automatically from crack to drop, next to the range each roast level calls for • A target profile per bean: roast level, total time, drying, Maillard, and development minutes, plus the second you expect first crack • An origin notebook with country, region, process, varietal, altitude, and tasting notes, and lots that track green weight and date acquired • Cup scores and notes on every roast, rolled up into an Insights page that ranks your origins by how they actually tasted PERFECT FOR • Home roasters chasing a repeatable light roast on a heat gun, air roaster, or popcorn popper • Small-batch drum roasters who want a record of every lot without a laptop on the bench • Green-bean buyers deciding which origin and process earned a second order • Anyone on their first bag of green coffee who wants to understand first crack, not just hear it WHY NOT JUST A NOTEBOOK OR A STOPWATCH? A stopwatch tells you when the roast ended. A notebook tells you what you meant to do. Drupe puts the temperature points, the crack times, the development percentage, and the cup score on one screen for one roast, and then lines the roasts up side by side so the pattern is obvious: which origin, which profile, which drop temperature gave you the cup you keep going back to. PRIVATE BY DEFAULT Every origin, lot, profile, and roast stays on your iPhone. No account, no sign-in, no cloud sync, no analytics, no ads. Drupe works fully offline at the bench, the balcony, or the garage. FULL ACCESS Drupe requires a subscription or a one-time purchase after onboarding. Choose a weekly plan, a yearly plan, or a lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and you can manage or cancel them at any time in your App Store account settings. The exact price for your country is shown in the app before you confirm. Add your first lot, pick a profile, and log the next roast from charge to drop. Terms of Service: https://pnkl26.web.app/terms-of-service Privacy Policy: https://pnkl26.web.app/privacy-policy Support: pnkhanhlinh0206@gmail.com

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Initial release.

Version 1.1.0

Subscriptions

In-App Purchases

The developer, Linh Phan Nhat Khanh, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Linh Phan Nhat Khanh
    Size
    4.3 MB
    Category
    Food & Drink
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Bean Profile Lifetime $29.99
    • Drupe Premium Weekly $2.99
    • Drupe Premium Yearly $14.99
    • Learn More
    Copyright
    © 2026 PNKL
  • Developer Website
  • Privacy Policy

    • More by Linh Phan Nhat Khanh

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