For iPhone
SourPro guides the bake step by step, keeps the starter alive, calculates by baker's percentages, and remembers every loaf.
One purchase.No account, no subscription, no analytics. Nothing leaves your phone, because the app contains no way to send it.
Built for a floury hand.The Bench reads from a metre away: a phone on the counter, a big clock, one button.
Written by a baker.Every line was written for the reader by someone who bakes, with respect for how tricky fermentation is.
On the Bench
A bake can run twenty-four hours. SourPro computes the whole timeline the moment you start, paces the fermentation to your room temperature, and rings when the dough needs you: folds, shaping, the oven. Close the app, sleep, forget it. The plan is still there in the morning.
Ahead of the plan? Mark the step done and the next one starts now. Behind it? Give it a bit longer and everything after moves with it.
The Starter
Name your starter, tell the app how often you feed it, and it reminds you before things get sluggish. Its own hydration flows straight into every recipe you bake, so the formula is yours, not a textbook's.
The Calculator
Flour is 100 per cent and everything else follows. The starter's own flour and water are counted in the hydration, which is the mistake most calculators make. Scale by flour weight or by loaves, and read the result in grams.
The Bread Book
Photographs, notes and a rating for each loaf, with the timeline as it happened and the temperature of the kitchen that day. The pages that go wrong teach more than the ones that don't.
The Pantry
Tell the app what you keep on the shelf and it starts to know. Starting a bake takes the flour off the shelf; a Thursday reminder tells you when something is low; a restock list links out to where to buy it. The app works without a pantry and improves with one.
Reading the Loaf
Dense crumb, flat loaf, gummy middle. Find what you see and the causes queue in order of likelihood, written in full sentences by a baker, not a chatbot. Offered where a problem shows, and kept in the library for later.
How's it looking?
Photograph the dough mid-bake and SourPro compares it with your own past bakes at the same stage, on the phone. On iPhones with Apple Intelligence running iOS 27, the on-device model reads the photograph itself and says what it sees, in words a baker would use. Every reading is honest about what it is, and your hands outrank it.