How it works
The engineering behind the app: clock sync, photo finish, the relay, and the data model.
- How clock sync works across a dozen devicesEvery device continuously measures its offset from one shared time source, so times captured on separate phones are directly comparable.
- How the photo finish camera worksOne camera images a single line at the finish, thousands of times a second. Stacking those slivers over time freezes the action across the line.
Looking for something else? Browse every article or start from the top.