Train anywhere. Measure everything.

Your phone is the timing gate.

Real timing gates, from the phone in your pocket. Field-tested sprint timing with hundredth-of-a-second splits. No beams to line up, no pods to charge, no timing gates to buy.

2-day free trial · annual plan · cancel any time

  • 2-day free trial
  • iPhone and Android
  • No WiFi at the field? Use the coach’s hotspot
  • One phone is the gate and the reaction light; two for splits
VELOCITY SPRINTSOLO
GATE VIEW
WAITHOLD STILL
0.000
Ready — arm when the runner is set
Camera
Scene
Gate
10 yd Sprint
Free
10 yd · scene auto · cue off — tap to edit
1.842
1.911
6
10 yd
Auto
Off
On · 1.5–4 s
Mia R.1.9111.8421.9681.8771.9051.934
TimerSessionAnalyticsAthletesSettings

That's the real screen. Watch it arm itself, or tap ARM GATES to run it again. Demo run: times are simulated.

How it works

Three moves. Then you just run.

The camera watches a line across the lane like a tripwire. Frames are analyzed on the phone and never leave it.

01 · STAND IT

Phone on a stand at the line

Point the camera across the lane. A cone marks the far end of the run.

02 · ARM IT

Tap ARM and hold still

The phone reads the scene and sets its own sensitivity. For reaction drills it then waits a random 1.5–4 s and flashes GO.

03 · RUN

The crossing stamps the time

Cross the line and the clock starts. Cross it again and it stops. Every rep is saved to that athlete.

One phone does both

Reaction light and stopwatch.

The phone on the stand is also the reaction light. The instant you cross the line it calls a direction, a color or a number — so you can't pre-plan the run. Then it times your return.

Left or right — a cone each side, go to the one it calls.

VELOCITY SPRINTSOLO
◀ ▶CROSS TO GET A CUE
TimerSessionAnalyticsAthletesSettings
Drill library

20 drills. Ten need only one phone.

Every drill comes with a setup diagram, step-by-step instructions and a one-tap load into the timer.

Browse the full library
Built for

Athletes, coaches, and the backyard.

No gimmicks, no bulky equipment, no large carrying case to lug around, and no price tag to match. All you need is one or two $10 iPhone stands.

Athletes

See your own numbers get better.

  • Personal bests per drill
  • Trend lines over the season
  • Reaction time saved separately from run time

Coaches

Time a whole squad without a gear bag.

  • Roster mode: tap the next athlete, go
  • Two phones for start–finish splits
  • CSV export for the spreadsheet

Parents

The driveway becomes a combine.

  • Nothing to buy — it's the phone you have
  • Set up in under a minute
  • Kid-safe: no accounts, no video leaves the phone
Install

Put it on your home screen.

It's a web app — no store, no account. Once it's loaded it opens even with no signal at the field.

iPhone

  1. Open the timer in Safari.
  2. Tap Share (the box with the arrow).
  3. Tap Add to Home Screen.

Android

  1. Open the timer in Chrome.
  2. Tap the menu.
  3. Tap Install app or Add to Home screen.

Velocity Sprint is a training tool. Use it to compare your own times over time. Frames are analyzed on the phone only — video is never recorded or uploaded. Athlete names and times stay in this phone’s browser unless you export them. See Privacy & Terms.