Is Ultra Baker really free?

Yes. No accounts, no ads, no in-app purchases on iPhone, Android, or the web.

What math does Ultra Baker use?

True baker's percentages where flour is 100%. Total dough = F + F·H + F·S. The two-stage starter is treated as 100% hydration, with seed (old starter) subtracted from the feed flour and water.

Does the bake timer survive a reload?

Yes. The timer persists in localStorage, so closing the tab or reloading the page keeps your bake on track.

How do I install on Android?

Download the APK from the GitHub release at https://github.com/moelven144/ultrabaker-android-release/releases/latest/download/ultra-baker-free.apk and allow installs from your browser.

Ultra Baker — Sourdough, calculated.

Ultra Baker — Sourdough, calculated.Ultra Baker is a free sourdough baker's percentage calculator for iPhone, Android, and the web. No accounts, no ads, no servers — your recipes and active bake timer live on your device.What it does

True baker's percentage math (flour = 100%).

Two-stage levain with old-starter carry-over.

Multi-flour blend editor for the dough flour.

Persistent 8-phase bake-day timer that survives reloads.

Starter guide for building, feeding, and storing a sourdough culture.

Defaults: 1200 g loaf, 67% hydration, 2% salt, 20% starter, 20% old-starter.More: /llms-full.txt · Starter guide