Lap Dog!

Limestone Labs LLC

About this app

Lapdog turns your phone into the timing booth for any lap race or time trial: criteriums, cyclocross, run laps, beer miles, club TTs, whatever you run.

TIME BY THE LAP
Tap a big button as each racer crosses the line. Splits, totals, and live standings update instantly. No transponders, no chip mats, no spreadsheet afterward.

MANY HANDS, ONE RESULT
Hand a timekeeper a link and put them on a lane or a rider; every tap merges into one live leaderboard in real time. Put a spotter up-course with another link to flag riders coming to the line, and your timekeepers get a heads-up and a buzz so nobody misses a bunch finish.

BUILT FOR REAL FIELDS
Set lap counts per category (juniors can race fewer laps than seniors in the same start). Mass-start everyone, break the field into waves on their own clocks, or run a true time trial with interval or tap-to-start. Fix the gun or a rider's start mid-race when something goes sideways.

ROSTERS WITHOUT RETYPING
Import from BikeReg, a CSV, or a Google/Office sheet, or build a sign-up form in a minute and share the link. Auto-number bibs, check riders in at the line.

SHARE IT
Every event gets a public results page: live timing during the race, a clean results sheet after, plus CSV and a printable version. Re-share the link any time.

Free to start. Works on the web too, at lapdog.cc.