← Docs

Your brews: measurements and Apply to recipe

Recipe versus batch: recording a brew, what you measured, comparing it with the recipe, and making the brew day your recipe.

Updated 2026-10-17

On this page

The app keeps two things apart:

  • the recipe is your plan: what you mean to brew and the numbers you expect;
  • a brew (a batch) is one time you brewed it: what you actually measured on the day.

A recipe is a calculated guess. The brew is what happened. You can turn the brew’s numbers into the recipe’s whenever you like, and older brews keep the recipe as it was when you brewed them.

Recording a brew

There are two ways:

  • Brew Day builds the record as you brew (see Brewing with Brew Day).
  • Brewed (the beer-glass button on a recipe, or Record a brew on Home) records a brew you’ve already done: the date, OG, volume, and FG if it’s finished. Tap Add measurements for the rest. Turn off Take ingredients out of stock for an old brew; otherwise the app shows what will come out before recording it.

What you can record

The Measurements form takes everything optional; fill in what you measured:

  • OG, FG, ABV (if you know it; otherwise it’s worked out from OG and FG), final pH;
  • mash and sparge volumes, sparge temperature, mash and sparge pH;
  • pre-boil and post-boil volume and gravity, boil time;
  • efficiency, worked out from your OG and volume if you leave it blank;
  • the salts and acid you actually added (tap Start from the recipe’s to begin from the recipe’s salts and correct them);
  • packaging: keg or bottle, the date, the volume and CO₂.

Recipe versus this brew

Open a finished brew from the recipe’s brew history. Recipe versus this brew shows the recipe’s number beside what you measured, with differences in orange. Measurements adds or corrects anything.

Apply to recipe

Apply to recipe makes this brew’s numbers the recipe’s own. You tick which ones:

  • OG, FG, the volumes and sparge temperature become the recipe’s own numbers (shown as manual);
  • batch size, boil time, efficiency and mash water become the recipe’s settings;
  • the salts you added become its water, entered by hand.

pH targets stay as they were: a measured pH is what happened, the target is what you aim for. Undo appears for a few seconds afterwards. Your other brews aren’t changed.

Deleting a brew

On a finished brew, ⋮ → Delete this brew, or swipe it away in the recipe’s brew history. Its readings go with it, and it can put the ingredients back in stock. To keep the brew but undo its stock, use ⋮ → Put ingredients back.

Next