Tools for the people who play, officiate, and run flat track derby — each one living at its own address under derby.io. Four are on the board. One you can use today; the board says exactly where the rest stand.
How much of a game is spent waiting?
19 minutes of every 60, standing still.
Adds up the 30-second lineup the rules put after every jam, across thousands of games of public WFTDA statsbook data. The median game gives up 31.3% of its clock to waiting, and that is before a single timeout, review, or injury is counted.
Open betweenthewhistles.derby.iotape.derby.io
Follow skaters and jams through bout footage, so video becomes something you can search rather than something you scrub.
Being built now — not usable yet. This address does not resolve, and there is nothing to try.
statsbook.derby.io
Check a statsbook before it goes anywhere: surface inconsistencies and data-entry problems, then export the whole thing as JSON.
Being built now — not usable yet. This address does not resolve, and there is nothing to try.
statslab.derby.io
Dig into jams, penalties, and lineups to see what actually decided a bout — for a single game or across a season.
Not started yet. This address does not resolve, and there is nothing to try.
Derby generates a startling amount of data — statsbooks, penalty tracking, lineups, hours of bout footage — and most of it gets handled by volunteers with spreadsheets at eleven at night. derby.io is a place to put tools that make that work less miserable.
Nothing here is a company or a product launch. Each tool gets a subdomain, an honest description, and a lane on this board. A magnet only moves up to Live when you can actually use the thing — until then the board says Building or Idea, because that is the truthful place for it.
Mike Fiedler, who referees as Ref In Peace, has been in roller derby since 2007, back when the WFTDA ruleset was at 2.1.1, minor penalties still existed, and a major put you in the box for a full minute. He skated for MRDA's New York Shock Exchange, volunteers as a referee with Gotham Roller Derby, and has worked on WFTDA Tech and JRDA Rules. Away from the track he is the PyPI Safety & Security Engineer at the Python Software Foundation. These tools come from wanting officials and leagues to get something back from the paperwork they already do.