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Coffee peaks
on day nine.

Track your bags. Get one notification on the day they hit peak. Don't drink stale coffee.

01
Log a bag in 10 seconds
Roaster, roast date, how you store it.
02
Get pinged at peak
One notification on the right day.
03
Reorder before stale
When the curve breaks, we tell you.

“Most coffee at home is drunk three weeks past peak. The bag in your kitchen right now probably is.”

Freshness curve

Where's your bag on the curve?

Roast date, storage, process, grind — see where your bag sits on the freshness curve and what to do next.

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Your coffee right now
PEAK
8
days since roast
96%
of peak
day 0peak ~ day 7day 35

Brew today. This is the window.

Don't guess next time.

We'll watch this bag and ping you the day it hits peak. One notification, no spam, perfect timing.

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Field Notes

Coffee, observed.

Practical guides on freshness, brewing, and tasting. Start with the science of coffee freshness .

9 MIN READ · JUNE 2026

The Cezve and the Geometry of Turkish Coffee

Turkish coffee is older than espresso by three centuries. The cezve produces a heavy-bodied cup with foam, settled grounds, and a social pace that specialty pour-over is still trying to recover.

11 MIN READ · JUNE 2026

The Ethiopian Buna Ceremony

The buna ceremony is not exotic performance — it is daily hospitality. Roast on charcoal, brew in a jebena, serve abol, tona, and baraka while conversation deepens.

All field notes →

Mug Wall

From readers.

Coffee mugs from Day 9 readers. Submit yours.

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Work Buddies

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You could be next on the wall.

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