Precision Coffee Brewing
Like Duolingo, but for Precision Coffee Brewing. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 10 levels across 2 sections, about 20 minutes end to end, roughly 4 days at five minutes a day. It moves through The Extraction Loop and The Science of the Cup. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Precision Coffee Brewing
- Acids extract first
- Acids dissolve most easily
- Tannins and heavy compounds extract last
- Sugars follow acids
- Sweetness peaks at balance
- Bitter plant fibers dissolve last
- Identifying sensory markers
- Extraction sequence
- Changing one variable like grind size isolates the cause of flavor shifts
- Identifying the sensory markers of extraction levels
- Adjusting multiple factors at once makes it impossible to map results
- A coarser grind specifically slows extraction to reduce bitterness
- The sequential extraction of flavors in a brew
- Strength refers to the concentration of coffee solids in the water
- Applying the rule of isolating variables to fix a brew
- Brew logs track the relationship between input settings and taste
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Precision Coffee Brewing the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
In the story of a single brew, which flavor group is the first to make an appearance?
Get it right to open this lesson and 9 more in the app.
Where Precision Coffee Brewing takes you
Move beyond the recipe and learn to 'dial in' your coffee by mastering extraction theory, water chemistry, and the mechanics of the brew bed.
- 1
The Extraction Loop
- Dialing In by Taste
- Mastering the Grind
- 2
The Science of the Cup
- Water Chemistry and Heat
- Managing the Brew Bed
2 sections · 4 units · 10 levels. Built to play, not to enroll.
You pick the voice
Precision Coffee Brewing is taught in the The Storyteller style: every lesson is a story. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Precision Coffee Brewing today.
Download Tomo, search Precision Coffee Brewing, and play your first lesson in under a minute.