Yeast: Sourdough & Pizza

Yeast is the sourdough engine for people who care how fermentation actually behaves — not another recipe list, and definitely not an AI chatbot.

Tell it your starter's feed ratio and your kitchen temperature: it predicts the peak — and the more you bake, the better it knows YOUR culture. Tell it when you want to bake: it back-solves the whole schedule — feeds, ferments, folds — so the last stage finishes exactly when you pull the loaf. The math is research-grounded and runs entirely on your phone. No account. No ads. No data leaves your device.

FREE, AND GENEROUS
• A sourdough starter with feed logging, peak predictions and reminders — plus an activation planner that back-solves your feed schedule from "ready to bake Saturday 9am".
• The FULL pizza dough calculator — Direct, Biga, Poolish and Sourdough methods, multi-flour, backward-solved to your bake time. Free forever, no ads.
• The Balance instrument — see whether your dough will land tenacious or extensible before you mix, with plain-language fixes when it drifts.
• A bake journal with photos, plus saved presets.

YEAST PRO
• Per-starter calibration — log a real peak and predictions tune to YOUR culture. The more you bake, the sharper it gets.
• Bread module — levain loaf recipes, the mix-water temperature to hit your target dough temp, and bulk-rise targets with aliquot-jar guidance.
• Croissant module — lamination geometry for any fold sequence, butter-block quantities, and a proof-temperature guardrail.
• Unlimited starters, unlimited journal entries, unlimited saved recipes, and every maker preset.

WHY IT'S DIFFERENT
Most apps count one number: total hours. Yeast models fermentation the way it actually works — time AND temperature, with separate curves for yeast activity and gluten breakdown. It knows a warm stage after a cold one behaves differently than the reverse. It knows every flour has a fermentation budget and warns you before you blow past it and the dough collapses. That's the difference between a timer and an engine that tells you why.

PRIVATE BY DESIGN
Everything runs on-device. No login, no tracking, no cloud. Your starters, your journal, your recipes — yours, on your phone.

Fully available in English and German — interface and baking guidance.

YEAST PRO PRICING
$19.99/year with a 7-day free trial · $2.99/month · or $49.99 once for lifetime access.

Yeast Pro Annual and Monthly are auto-renewing subscriptions. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the period. Manage or cancel anytime in your App Store account settings. The Lifetime option is a one-time purchase. Any unused portion of a free trial is forfeited when a subscription is purchased.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://yeast-baking.netlify.app/privacy.html