HELLEBORUS

The problem: Dance crews rehearse in front of a mirror or a phone, but nobody can see timing at full speed. When five dancers hit a move, the one who’s a tenth of a second early or drifting out of the line blends in. Choreographers catch it by rewatching footage frame by frame, which takes hours most crews don’t have. Without a coach in the room, crews repeat the same mistakes run after run and can’t tell whether they’re improving. Crew Sync turns one phone video of a dance crew’s run-through into a coach’s notes. It tracks every dancer with SAM 3.1, measures each one’s timing against the rest of the crew beat by beat, checks the formation from above, and tells you who to fix first. Then it hands you a 20-second Sync Score Reel to post.