Every result in the Combine app is labelled "App-timed · combine-style start". Here's what that means and how we test it.
The app lays out the course with the iPhone camera. The clock starts on your own first movement and stops when you cross the line. No human reaction time at either end.
We run the app side by side with laser timing (and 120 fps video for the jumps) with athletes of different heights at full effort. For each test we report the average difference and the spread.
| Test | Athletes | Runs | Avg. difference vs laser | Spread | Status |
|---|---|---|---|---|---|
| 40-yard dash | Validation in progress — numbers published after our next laser session | — | |||
| 10-yard split | — | — | |||
| 20-yard shuttle | — | — | |||
| 3-cone | — | Beta | |||
| Broad jump | — | — | |||
| Vertical | — | Beta | |||
A Beta test tracks your own progress but doesn't appear on leaderboards until it meets our bar. We'd rather say Beta than pretend.
Hand-timed 40s usually read 0.2–0.3 s faster than electronic times. If you compare your app time with a stopwatch time, expect the app to be slower — and more honest.
We measure flight time and derive the rise of your centre of mass. Combine verticals use reach (Vertec), which reads about 5.5 inches higher. For NFL comparisons we add that adjustment and say so on the card.
NFL comparisons in the app use official NFL Combine results (electronic timing) by position group. Pro-day numbers are never used for norms. Your number is app-timed; theirs is Combine-timed — the card says both.
Last updated October 2026. Not affiliated with the NFL or the NFL Scouting Combine.