Match replay — see what happened

Drop a CSV from your FTC match. Get voltage charts, loop time charts, and diagnostic insights — what went wrong and what to fix before the next match. Runs entirely in your browser. Add to your home screen to use offline.

Drop a match CSV here

Or browse to choose a file. CSV stays on your device — nothing is uploaded.

Loaded:

Duration

—

Min voltage

—

Loop spikes

—

Stalls

—

Battery voltage

Healthy > 11.5 V · Critical < 10.5 V

Loop time

Target < 30 ms · Spike threshold 50 ms · Logger cost subtracted

What happened

How to use this

This page reads CSVs produced by the Recorder helper in our FTC starter repo. Recorder writes a schema header line that this analyzer reads to recognize fields regardless of how you named your columns.

Get a CSV off the Control Hub: use REV Hardware Client (Tools → File Manager → /sdcard/FIRST/) or adb pull /sdcard/FIRST/.
Don't have a CSV yet? Try the sample CSV to see what the analyzer surfaces.
Want this on your tablet at home? Open the menu and pick "Add to Home Screen." Works offline after that.

What gets analyzed depends on what you logged. Register .voltage() + .loopMs() at minimum. Add .motor(name, motor) and .gamepad(n, gp) to unlock stall detection and driver-input timelines.