For many years I tracked my weight with The Hacker's Diet Online, created by John Walker. It kept working for a good while after his death, but in March 2026 it finally stopped.

I tried Yet Another Diet Tool as a replacement, but its interface wasn't for me. So I vibe-coded my own version, and Kilo Tracker is the result. It's free for anyone to use.

Kilo Tracker is open source software. You can download the source code and run your own copy from github.com/ramondevries/kilo.

I hope you like it! You can reach me at ramon@11tools.com.

Version v1.5.0 · committed Nov 4, 2026

A 13-minute video on YouTube shows how Kilo Tracker works, from signing in to sharing your chart and taking your data with you.

There are no passwords. Enter your email and we send a 6-digit code that's valid for 30 minutes — enter it and you're signed in.

We never store your email address itself in our database. Instead we keep a one-way SHA-256 hash of it (the same scheme Gravatar uses).

That hash also doubles as your Gravatar id — if you have an avatar set up at gravatar.com, it shows up automatically once you're signed in.

Kilo fetches that avatar from Gravatar itself and keeps a copy for a day, so Gravatar never sees your visits, your browser or your IP address.