Sourdough Calculator & Journal is a compact baking utility that handles the math, timing, and record-keeping for sourdough bakers so you can focus on shaping and flavor. The app computes baker's percentages, calculates dough hydration (including water contributed by your starter), scales recipes to any target weight, and lays out a full bake timeline with step timers. It also manages starter feedings with reminders and stores a photo journal of each loaf, making it useful for hobbyists and serious bakers who want accurate calculations, reliable scheduling, and a visual log on phone or tablet.
Key Features
⭐ Live baker's percentage calculator: enter flour, water, salt and starter or yeast amounts, add multiple flours, and save any calculation as a recipe with instant percentage updates.
⭐ Dough hydration calculator that includes water from your starter and shows target hydration ranges for common styles like sandwich loaf, boule, ciabatta, focaccia, baguette and bagels.
⭐ Sourdough starter manager and build calculator: track starter health, feeding ratios and ambient temperature, log one-tap feedings with ratios and see the next-feeding time at a glance.
⭐ Feeding schedule and reliable local reminders with configurable intervals (4, 6, 8, 12 or 24 hours), plus the ability to pause notifications when the starter is refrigerated.
⭐ Bake timeline planner and recipe scaler: plan forwards or backwards from a target finish time, step through autolyse, bulk ferment, shaping, cold proof and bake with timers, and scale recipes to a target dough weight or number of loaves while preserving baker's percentages.
⭐ Photo bake journal and offline functionality: log every loaf with photos, notes, tags and ratings, browse 16 built-in recipes with real photos, and use Sourdough Calculator & Journal entirely on-device without an account.
Advantages
✅ Saves time and reduces errors by doing the baker's math for you, so measurements and percentages stay consistent across bakes.
✅ Makes scheduling multi-stage or multi-day bakes practical with clear timers and a one-tap advance through each step.
✅ Sourdough Calculator & Journal keeps your data private by running locally with no sign-up, no cloud and no tracking.
✅ Built-in recipe library, photo journal and precise scaling help you iterate and improve results loaf after loaf.
Disadvantages
❎ The full feature set (unlimited journal entries and photos, the bake timeline planner, feeding notifications, the full 16-recipe library and ad-free experience) requires a one-time Pro purchase of $4.99.
❎ All data is stored only on the device: there is no cloud sync or cross-device backup, so recipes and photos do not automatically transfer between devices.
