4:6
Deep dive
Why we built the Kasuya 4:6
into every version of Swirl
into every version of Swirl
Tetsu Kasuya's method isn't just a recipe — it's a framework for understanding how extraction works. We break down why it's the best starting point for any pour-over learner, and how we implemented it in the app.
Changelog
Swirl Beta is live
After six months of brewing, logging, and second-guessing ourselves, we finally sent the first TestFlight invites. Here's what's in it and what's still rough around the edges.
Craft
The bloom matters more than you think
The first 45 seconds of a pour-over determine more about the final cup than any other variable. We looked at the science — and designed the timer around it.
Design
Why Swirl has no home screen
Most apps greet you with a dashboard. Swirl opens to your last recipe. It wasn't an accident — it was the hardest product decision we made.
Beans
How to read a roast date
Peak flavour isn't the day it's roasted, and it's not three months later either. The bag-tracking feature in Swirl nudges you at the right moment — here's why.
Craft
AeroPress: inverted vs. standard
We've tried both. We've argued about both. Here's where we landed — and why the app ships with the inverted method as the default.
Building
Going indie: six months in
Revenue, downloads, and honest reflections on building a paid app in 2026 without a marketing budget or a growth team. Just coffee and stubbornness.
We publish when we have something worth saying — not on a schedule.
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