Solo developer

Built with AI.
Shipped in the open.

Small tools from a solo developer working at the intersection of technology, product thinking, and AI. No sign-ups. No tracking. Just useful things that work.

Zero cost to run
Works offline
No sign-up ever
Installs like an app
The Apps
Coffee Brew Calculator
Coffee Brew Calculator
Ratios, brew times, and step-by-step instructions for V60, French Press, AeroPress, Moka Pot, Chemex, and Espresso. Saves your settings.
Live
Works offline · Installable
HIIT Timer
HIIT Timer
Interval timer with audio beeps, rounds, custom exercises, and workout history. Built for phone use.
Live
Works offline · Installable
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More coming soon
New tools in the works. Building in public - follow along to see what ships next.
Coming soon
See it in action
About
Steve Chalmers

I got a Sage espresso machine and spent ages in my notes app trying to nail the dose. I looked for a decent HIIT timer on the Play Store and couldn't find one I liked. So I built my own.

AI and tech is my passion. I like to keep learning and stay fresh. These days that means using Claude Code to turn real problems from my own life into working tools. Most people could do the same. I just share what I make.

No cost. No sign-up. Freely given. Source code is on GitHub.