Levain: Sourdough Calculator

Levain is a calm, simple helper for baking sourdough bread and pizza at home. It keeps track of your starter, does the dough math, and walks you through every step of the bake.

NOT SURE? TAKE A PHOTO (LEVAIN PRO)
• Photo check: take a photo of your starter or your crumb and get a clear answer and what to do next (3 checks to try)
• Plan backward: say when you want the bread, and Levain works out when to feed and mix
Monthly, yearly with a 7-day free trial, or once for life. Everything else in Levain costs nothing.

TODAY, AT A GLANCE
Open the app and see how long ago you fed your starter and what the next step of your bake is, with a timer.

STARTER CARE
• Keep several sourdough starters, each with a name, photo and age
• Tap "I fed it" and Levain remembers when you last fed it
• See which starter is active, resting in the fridge, or needs feeding

CALCULATORS
• Pre-bake feeding: how much starter, flour and water to feed for the loaves you plan, at any ratio (1:1:1 to 1:12:12 or your own), with your jar's weight
• Baker's percentage: flour, hydration, salt and starter in grams, with several flour types (bread flour, whole wheat, spelt, rye)
• Pizza dough: Neapolitan, New York or pan pizza. Choose the number of dough balls and their weight, and get flour, water, starter, salt and oil

BAKE TRACKER WITH TIMERS
Pick a schedule that fits your day (work day, weekend or evening) and follow the bake step by step, with a timer and a chime for each stage:
• Starter at its peak, autolyse, mixing and bulk fermentation
• Stretch and fold timers
• Pre-shape, final shape and cold proof (6 to 24 hours)
• An oven preheat reminder one hour before the cold proof ends
• Two-phase baking: lid on, then lid off for the crust
• Alerts on your phone for every step, even when the app is closed
The plan follows what you really did: feed later, and the rest of the schedule moves with you.

YOUR RECIPES
Save recipes from the calculator and start a bake from any of them.

PRIVATE AND SIMPLE
• No account and no sign-in: everything stays on your phone
• No ads
• Grams or ounces, light or dark look
• English, French, German, Italian, Japanese, Korean, Portuguese, Spanish and Hebrew

Whether you just made your first starter or you bake artisan bread every week, Levain keeps the timing and the numbers in one place, so you can focus on the dough.

Recent changes:
Levain 2.0 is a fresh, cleaner app:
• Today screen: your starter and the next bake step at a glance
• New pizza dough calculator (Neapolitan, New York, pan)
• Bake alerts even when the app is closed
• The schedule follows what you really did
• No account needed: everything stays on your phone
• Light and dark look, 9 languages
• Levain Pro: photo check for your starter and crumb, and plan a bake backward from when you want the bread
Your starters, bakes and recipes come with you.