What is centrd?

Centrd is a private, self hosted web app built for potters to keep a diary of their pottery throws, the cylinders they shape on a wheel, as they work through practice challenges like the well known 200 Cylinder challenge. Rather than relying on a cloud service, the whole thing runs on your own home server or computer, so all of your potter profiles, throw logs, settings, and photos stay on hardware you control. The app supports multiple potter profiles on one server, so a household or shared studio can track separate people's progress with their own name, studio, and a small emoji stamp as an avatar. Throws can be logged with precise decimal weights in pounds or kilograms, and the app automatically groups each entry into the nearest whole number challenge class while still keeping the exact weight in your history. You can set pacing goals for a challenge, such as a target date or a daily, weekly, or monthly rate, and track a piece through the six stages of clay work, from wet clay through leather hard, bone dry, bisqueware, glazed, and finished glaze, attaching photos at each stage. Because it uses real time updates between connected devices, logging a throw on your phone in the studio updates the dashboard on your laptop right away. There is also a built in export feature that packages your logs, metadata, and photos into a markdown journal and zip file for backup. Setting it up on a home server is straightforward and needs no external database or cloud API keys. The README offers two paths: running it as a Docker container, which is recommended for network attached storage devices like a Synology NAS, with a step by step guide included, or installing it directly with Node.js by cloning the repository, installing dependencies, building the frontend, and starting the server. Once running, other devices on the same home Wi-Fi network can reach it by typing the server's local IP address and port into a browser, and it can even be added to a phone's home screen for an app like feel. All data is stored locally in files that are deliberately excluded from Git, so private diary records and studio photos are never uploaded anywhere.