# Levain Log: Sourdough Journal — Sourdough without guesswork > Sourdough baking journal with temperature-aware fermentation timing and hydration calculator. (iPhone/iPad app by JOHN GILL.) - Source: https://appshunter.io/ios/app/levain-log-sourdough-journal/id6760217280 (this page in markdown: same URL + `.md`) - Developer: [JOHN GILL](https://appshunter.io/developer/1883304821) - Category: Food & Drink, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.1 · 42 MB - Languages: American English - Released: 2026-03-20 - Data updated: 2026-08-01 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/levain-log-sourdough-journal/id6760217280/reviews.md ## What is Levain Log? Track every bake. Master your sourdough. Levain Log is the bulk fermentation timer and bake journal built for home bakers who want to understand their dough — not just time it. Most sourdough failures come down to two things: inconsistent bulk fermentation and no record of what worked before. Levain Log solves both. INTELLIGENT Q10 FERMENTATION TIMING Levain Log uses Q10 — the biological principle that fermentation rate changes predictably with dough temperature — to give you accurate, real-time bulk fermentation estimates at every stage of the process. From your initial mix to your final stretch and fold, simply enter your dough temperature and Levain Log tells you exactly where you are in bulk fermentation. No more guessing. No more overfermented dough. STRETCH & FOLD LOGGING Log every stretch and fold with timestamps and dough temperature readings. Build a complete picture of your bulk fermentation from start to finish — and review it bake after bake to understand exactly how your dough behaves in your kitchen at any temperature. PROOFING TIMERS Set and track multiple proofing timers with notifications that alert you when your dough is ready — even hours later when your phone is locked and the app is closed. No more overproofed loaves because you lost track of time. HYDRATION CALCULATOR Calculate your dough hydration instantly. Dial in your formula and track it alongside your fermentation data for a complete picture of every bake. BAKE JOURNAL - PREMIUM Your complete bake journal lives in Levain Log. Review every bake with photos, ratings, and full fermentation data including temperature readings at every stage. See exactly how temperature affected your results and build the knowledge that turns good bakers into great ones. Unlimited bake storage means your journal grows with you. UNLIMITED RECIPES - PREMIUM Store unlimited recipes with full fermentation profiles. Compare bakes across different recipes and track your improvement over time. EXPORT YOUR DATA - PREMIUM Export your complete bake history and fermentation data as CSV, JSON, or PDF. Analyze your results, share your journey, or simply keep a backup. Your data is always yours. FREE TIER INCLUDES: - Full bulk fermentation timer with Q10 temperature-aware estimates - Stretch & fold logging with temperature tracking - Proofing timers with notifications - Hydration calculator - Single bake storage LEVAIN LOG PREMIUM INCLUDES EVERYTHING, PLUS: - Unlimited bake storage - Bake photos and ratings - Complete bake journal - Data export (CSV, JSON, PDF) - Unlimited recipe storage YOUR DATA STAYS ON YOUR DEVICE Levain Log stores everything locally on your device. No account required. No data collected. No subscription required for core features. Your recipes, bakes, and photos never leave your phone. Built by a sourdough baker, for sourdough bakers. ## Key features - Temperature-aware bulk fermentation timing (Q10) - Stretch and fold logging with timestamps - Multiple proofing timers with notifications - Hydration calculator - Bake journal with photos and ratings (Premium) - Unlimited recipe storage (Premium) - Data export (CSV, JSON, PDF) (Premium) ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Levain Log Premium | $4.99 | one-time | ## Frequently asked questions about Levain Log ### What is Levain Log? Levain Log is a sourdough baking journal designed to help home bakers understand their dough. It provides temperature-aware bulk fermentation timing, stretch and fold logging, and proofing timers to eliminate guesswork and improve bake consistency. ### How does Levain Log help with sourdough fermentation? Levain Log uses the Q10 principle, which accounts for dough temperature, to provide accurate real-time estimates of bulk fermentation progress. This helps prevent over-fermentation and ensures you know exactly where your dough is in the process. ### What features are included in the free version of Levain Log? The free tier includes the full bulk fermentation timer with Q10 estimates, stretch & fold logging with temperature tracking, proofing timers with notifications, a hydration calculator, and storage for a single bake. ### What are the benefits of Levain Log Premium? Levain Log Premium offers unlimited bake storage, the ability to add photos and ratings to your bakes, a complete bake journal, unlimited recipe storage, and data export options in CSV, JSON, or PDF formats. ### Does Levain Log have ads? No, Levain Log does not contain advertisements. The app is designed to be ad-free, focusing on a clean user experience for bakers. ### Is Levain Log available on Android devices? Currently, Levain Log is supported on iPhone and iPod devices. Information regarding Android compatibility is not yet available. ### How often is Levain Log updated? The latest version of Levain Log is 1.0.2, which was last updated on May 9, 2026. Updates are released to improve functionality and add new features. ### Does Levain Log collect user data? No, Levain Log prioritizes user privacy by storing all data locally on your device. No account is required, and no data is collected by the developer. ## Version history (last 3 releases) ### 1.0.2 — 2026-05-09 Bug Fixes ### 1.0.1 — 2026-03-21 Bug Fixes ### 1.0.0 — 2026-03-21 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*