Portuguese. Living in Barcelona. Writing about what I use, where I go, and what I build.

Reviews everything. Tech and training mostly. Sometimes food, sometimes travel, sometimes anything I get carried away with.

Writing

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The tools that get out of the way

11 Apr 20262 min

Every tool I still use after five years has the same property, and it is not the one the landing page advertises.

Negative splits

24 Feb 20262 min

Running taught me that going out slower is not caution. It is arithmetic — and it applies to shipping software too.

Apps

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DueDad

2025 · building

A pregnancy app I built while becoming a father.

Ready when baby is — pregnancy in straightforward, dad-friendly terms, week by week, with a prep checklist for each one.

React Native
Expo
TypeScript

SideKit

2025

Your running sidekick. Gear recommendations and smart scheduling, worked out from real-time weather.

Never wonder what to wear on your run again — clothing, accessories and fuelling, from the temperature, wind, precipitation, UV index and air quality.

React Native
Expo
iOS + Android

App Store

New essays, by email

New essays, sent when they are finished. No schedule, no filler.

Not wired up yet — add your Buttondown username to src/consts.ts to switch this on.