Zym Brewing

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. 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. Add your own custom steps. Connect your AI Brewmaster for real-time, context-aware advice at every step, though every step works perfectly without it. LIVE FERMENTATION DATA Connect an iSpindel, Tilt, RAPT Pill, or Home Assistant and Zym auto-logs gravity and temperature straight onto your fermentation curve. Bring your own device and data link — no accounts, no middleman. Check battery and signal before the sensor even goes in the beer. 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. 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 BJCP style targets, mineral additions, live Cl:SO₄ ratio, and Campden dosing. Import your water report as a PDF and Zym does the rest. YEAST BANK & REPITCH Harvest yeast from a batch into your bank, track each generation, slurry volume, and viability as it ages, then repitch with cell counts and starter size worked out for you. 18 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 ,with a live countdown on your lock screen and notifications that fire even when your phone is locked. BEERXML IMPORT & EXPORT Bring your existing recipes with you; import BeerXML from any brewing app, and export yours to share or back up. Your recipes are never locked in. 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. 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 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. DESIGNED FOR iPHONE, iPAD & MAC One universal app with two-pane layouts and landscape support on the big screen. 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* By downloading Zym you agree to our Terms of Use: https://zym.beer/terms Privacy Policy: https://zym.beer/privacy