I built DaysAbroad, a privacy-first iOS app that automatically tracks how many days you spend in each country using GPS. Useful for tax residency rules, Schengen visa limits, and immigration compliance.

After years of failing with Notion and Obsidian, I built an AI-powered second brain that automatically captures, classifies, and connects my thoughts -- no discipline required.

I built a free music toolkit app for the band Brasil Papaya, featuring a guitar & bass tuner, metronome, sound meter, and waveform visualizer. Available on iOS and Android.

After nearly a decade of testing storage solutions, both web2 and web3, there's only one permanent storage stack I'm still bullish on: Arweave + ar.io. Here's why.

I built a unified health dashboard that connects WHOOP and Withings data into a single view with interactive charts, trends, and CSV exports.

JPEG XL is a next-generation image format offering superior lossless and lossy compression, fast progressive loading, and modern features

After buying a tiny eINK reader, now it's time to have a tool to easily convert articles to epub so that we can read it anywhere

For the past months, while in Asia, I've been testing a mobile app called Walkscape, and boy it's fun. Let me tell you all about it

Build a DIY Helium hotspot using Raspberry Pi and LoRa gateway. Complete guide to join the Helium blockchain network, earn HNT tokens, and contribute to the IoT revolution.

Set up a Helium blockchain miner on DigitalOcean cloud server. Complete tutorial for running HNT mining in the cloud with Docker, including $100 credit bonus guide.