Brewster - Espresso Companion

Brew Better Espresso

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Brewster helps you systematically improve your espresso — shot by shot. Log your brew parameters, rate the result, and get immediate suggestions on what to adjust next. No more guessing whether to grind finer, change the dose, or adjust brew time. FEATURES • Brew logbook — Record grind setting, dose, yield, brew time, temperature, and pressure for every shot • Taste rating — Rate acidity, bitterness, body, sweetness, and overall impression • Smart correction — Get precise adjustment suggestions based on your results • Grinder calibration — Choose from 100+ grinders or set up your own, with grind size recommendations • Bean management — Save your beans with roast level, blend composition, and age tracking • Analysis — Spot trends and get tips to refine your technique • Transparent logic — Understand exactly why Brewster recommends a specific adjustment PRIVACY Brewster works completely offline. No accounts, no cloud, no trackers, no ads. Your data stays on your device. Export or delete it anytime. Brewster is for anyone who takes their espresso seriously — from beginners with their first machine to experienced home baristas.

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Brewster 1.1 is our biggest update yet, with a reworked correction engine and plenty of new dial-in tools. - Smarter corrections: Brewster now takes roast date, roast level, your grinder and earlier shots into account. It recommends sensible steps for grind, yield, temperature and now also dose, and explains why. - Channeling detection: suspicious shots are flagged, and you get puck-prep tips instead of a recipe change. - See the result right after saving, with "Start next shot with these values" - Dial-in path: the extraction map shows your recent shots of the same bean and how close you are to the sweet spot. - Shot timer with Live Activity and Dynamic Island - A recipe per bean: Brewster remembers your best shot and suggests starting values for new beans. - Photos of your shot or puck, stored on your device only - Share a recipe as an image - Faster shot form: steppers, 5-step taste rating, live brew ratio - New charts in History, improved Dark Mode and many design and accessibility improvements

The developer, Matthias Edelmann, 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

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

    Seller
    Matthias Edelmann
    Size
    4.7 MB
    Category
    Food & Drink
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    Languages
    English and German
    Age Rating
    4+
    Copyright
    © 2026 Matthias Edelmann