Live roller derby stats, built for the bench.
DerbyMetrics runs on the bench coach's iPad. Set the lineup, tap the points after each pass, tap a skater when they get a penalty. It tells you who is close to fouling out, who is rested, and which walls are holding their jammers.
Free while in pilot. Works offline. WFTDA, USARS and JRDA rules.
Lineups in one tap
A suggested lineup is ready every jam: your jammer rotation and planned walls first, then who is rested and playing well.
Points per pass
Tap the number the jam ref signals. Per-pass data shows which walls actually hold jammers, not just who was on during a long jam.
Foul-out watch
Penalty counts on every skater, a warning at 5 and 6, and a flag for anyone picking up penalties fast.
Undo anything
No pop-ups asking if you are sure during play. Every tap can be undone, and the timeline lets you fix any jam later.
Scout their jammers
Log their jammer's number each jam and see who is scoring on you, and which of your blockers hold each one best.
Bench manager mode
A second person can log passes and penalties on their own device while you run lineups. Scan a QR code to join.
Works with no wifi
Install it to the iPad Home Screen and it runs with no connection. Every tap is saved on the device instantly.
Your rules
WFTDA 2025, USARS Domestic, and JRDA juniors. Jam length, box rules, reviews and penalty codes follow the ruleset.
How it works
- Before the game: add your roster (number and derby name), mark who jams, pivots and blocks, and paste in the opponent's numbers.
- Between jams: accept or tweak the suggested lineup, tap their jammer's number, then tap Jam start on the whistle.
- During the jam: tap lead, tap the points after each pass, tap a skater for a penalty. Tap Jam end.
- At timeouts and halftime: open the stats for jammers, walls, their jammers, and where points are leaking.
Your data
Games are saved on your device. DerbyMetrics only needs roster numbers and derby names: no legal names, birth dates or contact details, which matters for junior leagues. Each team's data, including its scouting notes, is visible only to that team.