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.
24 levels across 3 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through The Precision Mindset, Controlling the Variables, and Measuring Quality and Science. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Precision Coffee Brewing
- Darker roasts are less dense and take up more physical space than light roasts
- The tare function zeros the scale to ignore the weight of the vessel
- A scoop of light beans contains more mass than a scoop of dark beans
- Taring allows for the calculation of 'net weight' of the liquid yield
- Why weighing is superior to using scoops or volume markers
- The practical application of the tare function in coffee brewing
- Dose refers specifically to the dry weight of the coffee grounds
- Yield is the final weight of the brewed coffee in the cup
- Small changes in espresso dose (0.5g) significantly alter extraction time
- 0.1g resolution is required to manage the tight tolerances of espresso
- Distinguishing between dose and yield in a recipe
- Crema adds volume but little mass
- Distinguishing between dose and yield
- Bean age affects crema thickness
- Scale precision for espresso
- Crema masks true liquid yield
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.
You place a heavy ceramic mug on your scale. What happens when you press the 'tare' button?
Get it right to open this lesson and 23 more in the app.
Where Precision Coffee Brewing takes you
Move beyond the scoop and learn to control the variables that define a perfect cup. Master the math of ratios, the physics of extraction, and the chemistry of water to achieve professional consistency at home.
- 1
The Precision Mindset
- Weighing for Consistency
- Mastering the Brew Ratio
- 2
Controlling the Variables
- Temperature and Heat Transfer
- Timing the Extraction
- Grind Size and Surface Area
- 3
Measuring Quality and Science
- Dialing In by the Numbers
- TDS and Extraction Yield
- Measuring Water Chemistry
3 sections · 8 units · 24 levels. Built to play, not to enroll.
You pick the voice
Precision Coffee Brewing is taught in the The Bestie style: your friend who just gets it. 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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Dialing in Your Daily Brew
Move beyond the basic recipe and learn to manipulate the variables of extraction to craft the perfect cup every morning.
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Espresso: Dialing in the Perfect Shot
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Better Coffee at Home
Stop settling for mediocre mornings. Learn to brew cafe-quality coffee by mastering the variables that actually matter, from bean selection to extraction science.
Start Precision Coffee Brewing today.
Download Tomo, search Precision Coffee Brewing, and play your first lesson in under a minute.