Something new to learn about coffee. Today, and again tomorrow.
Start on the free plan, which doesn't expire.
A coffee school in app form.
Content drawn from books and studies, with a glossary built by the people who read it.
Talk at the community Tables, where learning goes both ways.
Log every brew on the Bancada TCS and see what to change in the next cup.
App home screen with the Daily Cup open
In fermentation, mucilage isn't only removed: it is transformed. Micro-organisms break down that sugar-rich layer and change the environment of processing — pH falls from around 6.5 to 4.1. That is part of what helps explain why the acidity tends to come across juicier than in mechanical removal…
Grinding coffee looks like a step in between: the bean goes in whole, comes out in pieces, and the drink comes later. But a lot is already decided there.
A coffee school in app form.
Content drawn from books and studies, with a glossary built by the people who read it.
Talk at the community Tables, where learning goes both ways.
Log every brew on the Bancada TCS and see what to change in the next cup.
You drink coffee every day. You almost never ask why it turned out this way.
There's a line that shows up in nearly every conversation about water and coffee: water is more than 98% of the drink, so it had better taste good. Jonathan Gagné, a researcher in astrophysics, hears that argument often, and thinks it misses the point. Not because it is false. Because it is the least interesting part of the subject.
Gagné wrote a book on the physics of filter coffee. What he finds more interesting is the other way round: water that tastes perfectly good can deliver bad coffee, or merely dull coffee. The point is not water spoiling the coffee. It is the water you would drink without complaint that still decides the result.
What decides is not how it tastes. It is what comes dissolved in it: hardness, which acts on , and , which neutralizes the acids the coffee has just delivered.
Every article carries its references at the end: The Physics of Filter Coffee (Gagné, 2020) · SCA Water Quality Handbook (2018)
Hold to grind the bean
When the archive doesn't support an answer, TCS says so.
And the question moves to the Tables, where there are people.
The archive covers both, but along different paths. The grinder decides the size and the regularity of the particles — that is the starting point any method extracts from.
Ground coffee loses aroma within minutes, so grinding fresh changes what reaches the cup, whichever coffee it is. A better coffee, ground unevenly, tends to extract unevenly, and part of what you paid for doesn't show up in the drink. With a single budget, the grinder tends to change the cup more — water comes right after, and the archive covers that too.
That's why the reactions here say what you thought:
No one is measured here.
Knowing doesn't have to become a display.
Mark a passage and it stays with you.
Write beside it, without leaving the reading.
What you keep organizes itself: by article, by date, by kind.
With color to separate a doubt from an idea, and tags to find it again.
Pin the note you keep rereading to the top.
Comment on the passage itself, and cite one note in another with @.
Try the same coffee on my grinder and on the café's. Write down the difference.
Five tables: Technique, Sensory, Origin, Gear, Discovery.
No one tastes for you.
The app's Tables screen, enlarged in three details: choosing a conversation, taking part by reacting, voting and replying, and the author coming back days later with the result.
Every conversation lives at one of the five tables.
Every conversation, in the order it happened.
Here you learn and you teach back.
NameAt the Tables you appear under a table name, not your own. You can use the name on your account, but the app suggests others — and once confirmed, it doesn't change again.
AvatarThe avatar is a coffee illustration, drawn from three; there is no profile photo. No one arrives at the conversation knowing who is a professional and who started yesterday — the sentence arrives before the person.
ContactThere are no private messages at the Tables. To take a conversation further, one person asks to swap contacts — Instagram or WhatsApp — and nothing is revealed before both sides accept.
LimitSubscribers get two attempts a month, and the limit is deliberate: leaving the table is the exception, declining requires no explanation, and anyone who prefers can block new requests without the other person knowing.
It stays between you and your cup.
Your path, the name you chose, and the coffee that went through your cup.
Three questions suggest your path.
You take it, change it or redo it whenever you want.
The profile coffeetag, with the path, the name and the millilitres brewed
It isn't one more minute in your day. It's a minute that is yours.
Every brew teaches you something.
The suggestion only compares against your own brews of that coffee, with that method. No AI: it is arithmetic, and it runs on your phone.
Start on the free plan, which doesn't expire.
No lock-in: cancel through the store, whenever you want.
The subscription is made inside the app, whenever you want.
Come with a question, leave with something to try. In the conversations, learning goes both ways.
The free plan doesn't expire. You can stay on it.
THECOFFEESCHOOL.
