Sarah's Sourdough — the app.

Get the app
Sarah's SourdoughCo.
The Sourdough App · iOS · $9.99 once · coming soon

Bake better bread
without the guesswork.

An iOS app that watches your starter, predicts peak, logs your bakes, and runs the calculator. One purchase, yours forever — no subscription.

No subscription. No ads. Yours forever.

9:41
Tue 14 · 68°FToday

Two starters, both busy.

Henrietta
white · last fed 5h
At peak
Big Rye
rye · 80%
Rising
Next up

Mix levain at 4:15pm · bake at 9pm

Today
Recipes
Log
Calc
The deal

Everything you need to learn is on this site. Everything you need while you bake is in the app.

On this site · free, forever

The full guide

  • Day-by-day starter guide
  • Troubleshooting library
  • 100+ recipes
In the app · $9.99 once · coming soon

The tools that bake with you

  • Peak detection & reminders
  • Recipe OCR + .sourdoughrecipe sharing
  • Bake log with photos
What's in the app

Six things you'll use every bake.

Native iOS, offline-first, $9.99 once. Built in SwiftUI for iOS 26.4+. Optional iCloud sync via CloudKit — no servers, no analytics, no ads.

🔔
Peak prediction & alerts

A heads-up fires ~30 min before your starter peaks. The predictor adjusts for kitchen temperature.

📸
Recipe OCR

Point the camera at a cookbook or screenshot. On-device Vision parses ingredients, grams, baker's %, and steps.

📔
Bake log with recipe inlined

Photos, formula, rating, tags, notes — plus the full recipe you used, attached to every bake.

🤝
Portable .sourdoughrecipe files

Every recipe — yours, Sarah's, a friend's — is a tiny portable file. AirDrop, iMessage, email, iCloud. No accounts, no cloud lock-in.

⚖️
Calculator + 40 recipes

Feeding ratios, hydration, baker's percentages. Plus 40+ curated recipes from beginner loaves to croissants.

🔒
Private & offline by default

Zero analytics, zero SDKs, zero network calls. iCloud sync is opt-in via Apple's encrypted CloudKit.

Get the iOS App$9.99 · one-time

No subscription. No ads. Yours forever.

.sourdoughrecipe · the file format

Every recipe is a file you can keep, edit, and send.

The app reads a single, portable format — .sourdoughrecipe — that holds the whole recipe: ingredients with baker's percentages, every method step, timings, even your notes. AirDrop it. Text it. Save it to iCloud. The recipe travels with you and lands ready-to-bake on the other end.

✍️
Source 01

Recipes you create

Build one in the app or right here on the site — title, ingredients, method, hydration. Download the file, keep it forever. Edit it, scale it, fork it. The recipe is a file on your phone, not an entry in someone else's database.

🥖
Source 02

Recipes Sarah shares

Every one of the 100 recipes on the site downloads as a .sourdoughrecipe file. One tap on your iPhone, it's in your library — fully editable, with timers wired up to every step. New recipes added regularly.

🤝
Source 03

Recipes friends send

Your neighbor texts you their grandmother's rye. A friend AirDrops the loaf you loved last weekend. The file opens straight into the app — no copy, no paste, no “forward me the photo of the recipe again.”

How it moves
Website
Download from any recipe page
iPhone
Tap the file → opens in the app
Friend
AirDrop, iMessage, email, iCloud

No accounts, no cloud account links, no “sign in to view this recipe.” The file is the recipe — a few kilobytes of JSON wrapped in a custom UTI, openable only by the app. Photos travel inside the bake-log variant .sourdoughbake.

“Send me that loaf.”

Hold down the bake in your log, hit Share, AirDrop to your friend's iPhone. They tap once and they're looking at the same ingredient list, method, and notes you used. They can edit and re-share — it's their copy now.

“Save the family rye.”

Type your grandmother's recipe into the app once. Export the file, drop it in iCloud, AirDrop it to every cousin at Thanksgiving. The recipe outlives the app, the iPhone, and every cloud subscription you might ever quit.

Every feature, end to end

Thirteen reasons the app is worth $9.99 once.

💰
01

One price, forever

$9.99 once. No subscription, no account, no ads. Pays for itself in two months vs. any subscription competitor.

📴
02

Works completely offline

No login, no Wi-Fi, no servers. Open on a plane, in a kitchen with no signal, on a brand-new iPad — it just works.

📊
03

Smart starter tracking

Live time-since-fed, predicted peak, and rise multiplier on the home screen. Adjusted for your kitchen temperature.

🔔
04

Never miss a peak

Local notification ~30 min before your starter peaks. No push servers required.

📸
05

Recipe OCR from a photo

On-device Vision parses titles, ingredients (with auto-baker's %), and steps. Then it's editable and yours.

🤝
06

Portable .sourdoughrecipe files

Recipes you create, recipes Sarah shares, recipes friends send — all open as portable .sourdoughrecipe files. AirDrop, iMessage, email, iCloud. Photos travel in .sourdoughbake.

🍞
07

Forty-plus included recipes

Basic, Advanced, Breakfast, Snacks, Sweets — from a beginner sandwich loaf to laminated sourdough croissants.

📔
08

Bake log with the recipe baked in

Photos, formula, rating, tags, notes. The full recipe you used is inlined into every bake's detail view.

🛠️
09

In-app troubleshooting

Twenty problem-and-fix cards: pink streaks, hooch, acetone, gummy crumb, no oven spring, burnt bottom. No Googling at 6 AM.

10

Editable bake timer

Persistent across app restarts. Set "Bulk ferment 4h" on the home screen and a local notification fires when done.

🔒
11

Privacy by design

Zero third-party SDKs, zero analytics, zero tracking. iCloud sync is opt-in and uses Apple's encrypted CloudKit.

🖼️
12

Custom bread iconography

Hand-drawn loaf and wheat-stalk shapes throughout. Light, dark, and tinted app icon variants for every home screen.

♻️
13

Reset and start over

One button in Settings wipes every byte and restarts the tutorial. Your purchase is preserved — wipes don't cost you money.

Track your starter, predict peaks, log bakes with photos, scan recipes from photos, trade .sourdoughrecipe files with friends — all offline, no account, no subscription, $9.99 once.

Get the iOS App$9.99 · one-time
A baker's flour-dusted hands cradling a freshly baked sourdough boule with caramelized scoring and a dramatic ear.
Who's behind this

Hi, I'm Sarah. I've killed seven starters.

I started baking sourdough in 2019 and immediately found every way it can go wrong. After the seventh dead starter and the third Saturday spent baking at midnight because I missed peak, I started building the app I wished I had.

The site is everything I wish I'd known. The app is the assistant I wish I'd had — one purchase, no subscription, no tracking. Just bread.

— Sarah

Common questions

The honest answers.

Is it really one-time, or does $9.99 unlock a subscription later?

Really one-time. You pay $9.99 once, you own the app forever, every feature works on day one. No tiers, no "premium" upsell, no recurring charge buried in settings. Restore Purchase is supported on new devices.

Does it really work offline?

Yes. There are no servers and no required login. Every feature — peak detection, notifications, the calculator, the 40+ included recipes, the bake log, the OCR — runs on-device. Open the app on a plane or in a kitchen with no signal and it just works.

What about Android?

Not yet. I'm one person and iOS was where I had the bandwidth to start, built natively in SwiftUI for iOS 26.4+. If enough Android folks ask, it's next.

Why is the website free if the app costs money?

The site is where you learn. The app is where you bake. Reading about sourdough doesn't need a paid app, but feeding reminders, peak detection, and a bake log do. Different jobs.

Will my data be sold or tracked?

No. Zero third-party SDKs, zero analytics, zero network calls. Nothing leaves your device unless you choose to enable iCloud sync — and that uses Apple's encrypted CloudKit, never our servers (we don't have any).

How does the recipe scanning work?

Point your camera at a cookbook page or screenshot. On-device Vision text recognition parses the title, ingredients (with grams + auto-calculated baker's percentages), and step-by-step instructions. No image ever leaves your phone. The result is editable and yours to keep.

Can I share recipes with friends who also have the app?

Yes — via .sourdoughrecipe and .sourdoughbake files. Tap Share, send over AirDrop, iMessage, or email, and the recipient taps to import. Photos travel inside the file. No accounts, no cloud middleman.

I already use [other sourdough app]. Should I switch?

Honestly? If you're happy, no. If your current app is full of ads, gates the calculator behind a subscription, or doesn't have peak prediction — give this one a look. It's $9.99 once and works offline.

Stop missing peak.
Start logging bakes.

The app does the watching so you can do the baking. One purchase, yours forever.

Get the iOS App$9.99 · one-time

No subscription. No ads. Yours forever.