The batch you cannot repeat is the one you did not write down
The good batch always happens before you started taking notes, and by the time you want it again you cannot remember the mash temperature or which yeast it was. Log the brew day as it happens — the two gravity readings, what the ingredients cost, how much came out — and rate it once it is drinkable. Twelve batches in you have your own attenuation curve and the only cost-per-litre figure that settles the argument about whether this is cheaper than the shop.
⏱ 5h 56m“Finished at 1.018 again. Mash was two degrees too warm, and you can taste it.”
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What you’ll track
The Homebrew log, out of the box
One entry per session, with the timer and location always available. Add or rename variables any time in log settings.
Variable
Type
Stats shown
Style
Choice · tracked individually
Own stats per value
Batch size · l
Number
Sum, Average
Cost · €
Number
Sum, Average
OG
Number
Average
FG
Number
Average
ABV · %
Formula · (OG − FG) × 131.25
Average, Max
Rating
Rating 1–5
Average, Max
Timer
Built in
Total time, per entry duration
Location
Built in
Pin or place, shown on the log map
Notes, photos, sketches, voice memos
Built in
Attached to any entry
121l
Sum Batch size
20.2l
Average Batch size
184€
Sum Cost
30.6€
Average Cost
How it works
From install to first entry in a minute
1
Pick “Homebrew” during setup
The log is created with the variables above and a few example entries so you can see how it works. Clear them with one tap.
2
Log as you go
Tap plus, fill in what you have, save. Timer, location, notes and photos are there when you want them, hidden when you don’t.
3
Let the stats accumulate
Sum batch size sits on the log card, with the rest one tap away. Set a goal if you want a nudge.
Why this log
Built for the way you actually do it
Cost per litre, ingredients and all
Every euro of grain, hops and yeast in the log divided by every litre that came out of it. That is the figure to hold next to a shop shelf, and the honest version of it counts the batch you poured away.
Attenuation you can see improving
Two gravity readings per batch and the averages do the rest. The run of finals at 1.018 and the run at 1.010 are the same recipe with better mash control between them, and the log is where that shows up before your palate notices.
Each style with its own record
Mark "Style" as tracked individually and your stouts, IPAs and lagers keep separate averages and their own best rating. It is how you find out that the style you brew most is not the one you rate highest.
Everything else in the app
Not just a form. A logbook that thinks with you.
The Homebrew log is one log among many you can keep. Every one of them gets the same tools.
💡AI analysis
AI reads the pattern for you
Tap the bulb on Homebrew and get a plain-language read of your trends, what changed recently, and a suggested next goal, built only from your own entries.
🎯Goals
Goals, streaks and reminders
Set a target like three times a week, watch the rolling progress bar, keep a streak, and get a reminder at the time you actually log. The app learns that time from you.
📅Calendar
A calendar heatmap per log
Every log has its own month view showing which days you logged. Gaps are obvious, consistency is visible, and one tap opens that day's entries.
🔁Rounds
Several styles in one entry
One entry can hold a round per style, each with its own values, and the stats break them out separately.
📷Attachments
Photos, sketches, voice memos
Attach a photo, draw a quick sketch, or record a voice note on any entry. They stay with that entry and come back on every device you sign in on.
🗺️Map
Every entry on a map
Drop a pin or search for the place. Each log has a map view of everywhere you logged, and saved places open directly in Google Maps.
🔍Search
Search across everything
Find an entry by title, note or value across every log, filter by date or location, and jump straight to it.
🔒Privacy
Yours, offline first
Entries save on your phone first and sync when you sign in. No account needed to start, no feed, no one else sees your data.
Who keeps a brewing log
All-grain brewers chasing repeatability, for whom the whole hobby is the gap between the batch that was superb and the one after it that was not. People who brew in a garage with a thermometer and a notebook and would rather have the notebook on the phone that is already in the pocket of their apron. And anyone brewing to save money, who has never once checked whether it does.
It suits club brewers and competition entrants especially. When someone asks what the recipe was, the answer needs a gravity, a batch size and a date, and a log with sixty batches in it is also the thing that tells you which of them to enter.
What a year of batches shows
Attenuation is the first trend to appear, and it is the clearest sign of a brewer getting better. The finals drifting from 1.018 down to 1.010 across a dozen batches is mash temperature, yeast health and pitching rate all improving at once, and it shows in the averages long before it shows in a tasting.
Cost per litre is the number that surprises people. A batch of ordinary pale ale lands somewhere near a euro and a half a litre, which is a good deal; a heavily dry-hopped IPA with a specialist yeast can be three times that, which is still cheaper than the shop but no longer the reason you are doing it. Keep the ratings alongside and the useful question appears on its own: which of the styles you brew is actually worth the brew day.
Questions
Frequently asked
Do I have to work out the ABV myself?
No. ABV is a formula field: the log takes the gravity drop between OG and FG and multiplies it by 131.25, the usual homebrew rule of thumb, on every batch. Enter the two readings and the strength is there, ready for the label.
When do I fill in the rating?
Weeks later, when the beer is actually carbonated and cold. Open the brew-day entry and add it then; the entry keeps its brew date, so the batch stays in the right place on the timeline.
Should I log the fermentation readings too?
Most people keep one entry per batch and put the daily gravity readings in the notes as they go. If you want them charted, make a second log with one entry per reading and a Batch variable as the grouping key.
What about equipment, and does that count in cost per litre?
Keep the kettle and the fermenter out of the Cost field or the first batch will look like it cost two hundred euros a litre. Log the kit purchase as its own entry with a zero batch size, or in a separate log, and leave the ratio to the ingredients.
