TONND

Blog

Thoughts on health data, self-hosting, and building in the open.

TONND now sees what you eat. The loop is closed.

I added FatSecret food diary sync to TONND alongside Fitbit, Renpho, and Hevy. Per-meal macros, full micros, and why nutrition was the missing piece.

Your health data can talk now. You just have to ask.

Health apps collect great data but can't answer questions. We connected TONND to Claude via the Model Context Protocol so you can ask your Fitbit, Renpho, and Hevy data anything in plain language.

Your HRV is trying to tell you something. Most people ignore it.

Heart rate variability is the most underused metric on your wrist. Here's what the research says about HRV, training, and recovery — and why I built a dashboard that puts it next to your workout data.

Fitbit killed the dashboard. So I built my own.

Google shut down Fitbit's web dashboard in July 2024. Here's why I built TONND — an open-source replacement that connects Fitbit, Renpho, and soon calorie trackers and workout apps into one unified view.

I tracked my body in Excel at 12. Now I'm building the platform I wished existed.

From Excel spreadsheets at 12 to a self-hosted Fitbit dashboard. Why I built TONND, an open-source health tracking platform you run on your server.