Zym Brewing

Track recipes, batches, and brew days with optional AI-powered guidance. Water chemistry, BJCP styles, instrument scanning, and more. Free to try.

Zym is the brewing app built by a brewer, for brewers. Whether you're crafting your first batch or refining a recipe you've brewed a hundred times, Zym gives you the tools to brew smarter.

RECIPE BUILDER Build detailed recipes with a full grain bill — all-grain, extract, or partial mash — hop schedule, yeast selection, and water adjustments. Zym calculates OG, FG, ABV, IBU, and SRM as you build. Scale recipes to any batch size in seconds.

BATCH TRACKING Log every batch against your recipe. Track fermentation with a gravity curve, log temperature readings, and move batches through your pipeline from Planned to On Tap. Attach photos at every stage.

GUIDED BREW DAY Let Zym plan your brew day backwards from your target finish time. Step-by-step guidance through strike water, mash, sparge, boil, and chill — with timers and notifications throughout. Connect your AI Brewmaster for real-time advice and context-aware guidance at every step, though every step works perfectly without it.

INSTRUMENT SCANNER Photograph your hydrometer and Zym reads the gravity for you — powered by your AI provider if connected, or enter manually. No more squinting at meniscus lines. Readings log directly to your fermentation curve.

WATER CHEMISTRY Full water chemistry calculator with style targets, mineral additions, and acid treatment. Import your water report as a PDF and Zym does the rest.

17 CALCULATORS ABV, gravity, mash water, sparge volume, carbonation, hop utilisation, yeast pitch rate, refractometer correction, and more — all in one place, drag to reorder.

BJCP STYLE BROWSER Browse all BJCP 2021 styles with full stats, descriptions, and commercial examples. Compare your recipe against any style target.

BREW DAY TIMER Schedule hop additions, custom steps, and process notes. Notifications fire even when your phone is locked.

AI BREWMASTER (OPTIONAL) Bring your own API key from Anthropic, OpenAI, or Google and unlock an AI brewing assistant that knows your recipes, batches, water profile, and equipment. Ask anything, get brewing advice tailored to your brewery. Your data is sent directly to your chosen provider — Zym never stores it. AI features are entirely optional — every feature works without them.

AI MEMORY Your AI Brewmaster remembers your preferences, past decisions, and brewing style across conversations. The more you brew with Zym, the better it knows you.

PIPELINE & CALENDAR See all your batches at a glance in a kanban-style pipeline. Filter by stage, search by date, and track what's fermenting, conditioning, and on tap.

YEAST TRACKING Track yeast generations, slurry volumes, and viability. Know when your yeast is past its best.

LOCAL FIRST No account required. No login. Your data lives on your device and backs up to your own cloud storage. Zym never sees your data.

STANDARD SUBSCRIPTION Unlimited recipes and batches, all core features. £2.99/month or £19.99/year. Free to try — no credit card required.

PRO COMING SOON

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