Dialing In Your Coffee
Like Duolingo, but for Dialing In Your Coffee. 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.
Free during early access · No credit card · iPhone & Android

Key ideas in Dialing In Your Coffee
- Finer particles increase the total surface area available for water to dissolve flavors
- Acids dissolve first, creating a concentrated but sour 'front' to the shot
- A tighter pack of fine grounds creates more resistance, slowing down the water flow
- Sugars and oils follow, providing the body and sweetness of the 'middle'
- Heavier plant fibers and tannins extract last, adding bitterness to the 'tail'
- How grind size simultaneously affects surface area and water contact time
- The sequential order of flavor compounds extracted during a shot
- Crema inflation from CO2
- Isolating variables
- Grind size and resistance
- Yield by weight
- Extraction sequence
- The 1:17 'Golden Ratio' provides a balanced starting point for most palates
- Why weight is a more reliable metric for strength than crema-inflated volume
- Lowering the water ratio increases the concentration of coffee for a heavier mouthfeel
- The importance of isolating variables during the dialing-in process
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 Dialing In Your Coffee 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.
If you were to taste only the very first few drops of an espresso, what flavor profile would you expect to dominate?
Get it right to open this lesson and 11 more in the app.
Where Dialing In Your Coffee takes you
Move beyond the recipe and learn to manipulate variables like a professional barista to find the 'sweet spot' in every bean.
- 1
The Art of the Dial-In
- The Calibration Loop
- Diagnosing Extraction
- Water and Heat Dynamics
- 2
The Science of the Bean
- Roast Chemistry and Terroir
2 sections · 4 units · 12 levels. Built to play, not to enroll.
You pick the voice
Dialing In Your Coffee 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.
More Food & Drink on Tomo
Beyond the Label: Mastering Wine
Move past the basics and learn to decode complex flavors, pair like a pro, and navigate any wine list with confidence. Discover the hidden factors that make a great bottle stand out from the rest.
Mastering Your Morning Cup
Stop settling for bitter coffee and start brewing like a pro. Learn to fix your flavor, master the Moka Pot, and unlock the science behind the world's favorite bean.
Brewing Your Best Cup
Stop settling for mediocre coffee. Learn the simple, high-impact adjustments that turn your morning routine into a cafe-quality experience.
The Science and Craft of Coffee
Go beyond the basics of brewing to master the thermodynamics of roasting, the chemistry of extraction, and the complex microbiology of post-harvest processing.
Sourdough from Scratch
Stop buying yeast and start a lifelong partnership with a wild starter. Learn to bake crusty, tangy loaves using nothing but flour, water, and time.
Better Coffee at Home
Stop settling for bitter office sludge and start brewing cafe-quality coffee in your own kitchen using the tools you already own.
Start Dialing In Your Coffee today.
Download Tomo, search Dialing In Your Coffee, and play your first lesson in under a minute.