zerobrew: coffee dial-in

Your coffee tasted sour again. Or bitter. And you have no idea what to change: the grind, the water temperature, the ratio, the time. Most people change three things at once and hope. zerobrew replaces the guessing with one clear instruction. HOW IT WORKS 1. Log the brew: dose, yield, time, grind setting, water temperature. 2. Say how it tasted: sour, balanced or bitter. 3. Get the fix. Sour means under extracted, so grind finer. Bitter means over extracted, so pull less out. One change, not five. 4. Brew again and tell zerobrew whether it worked. The next suggestion is built on that answer. Sour is under extraction. Bitter is over extraction. zerobrew reads your numbers next to your taste note, then tells you which knob to turn and in which direction. WHAT YOU GET Dial-in coach on the home screen, ready before your first tap Taste diagnosis (sour, balanced, bitter) with a concrete next step Advice that remembers: if a change worked, the next move gets smaller, and if the cup got worse, the direction flips Guided first brew that walks you from bean to diagnosis Brew log for dose, yield, time, grind setting, water temperature and rating Bean shelf with roast dates and freshness, from resting to past peak Grinder tracking, so every grind setting stays tied to the right grinder Brew scores, streaks and achievements Shareable recipe cards with the diagnosis badge Starter recipes and a short setup quiz, so your first recipe already fits your gear Step by step brewing guides for every method METHODS Espresso, V60, AeroPress, Chemex, French press, Moka pot and cold brew. FREE AND PRO Free every day: one brew log, up to three beans, the brewing guides, the starter recipes, and your first dial-in fix shown in full with its steps. zerobrew Pro adds: Unlimited brew logs and beans Every dial-in suggestion, on every brew What changed between your best and your worst brew, side by side Insights: trends over time, method breakdown, top beans CSV export of your whole brew history Pro comes with a 7 day free trial. Monthly, annual and lifetime options. PRIVATE BY DEFAULT No account, no sign up, no cloud. Your beans and brews stay on your device. Coffee gets better when you stop changing five things at once. Log one brew, taste it, change one thing. Privacy Policy: https://greeneyeapp.com/en/legal/zerobrew-privacy Terms of Use (EULA): https://greeneyeapp.com/en/legal/zerobrew-terms