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Frequently Asked Questions
How accurate is the puck speed measurement?
Under good conditions — proper calibration, 120+ FPS, decent lighting, and a stable camera — accuracy is typically within 2–5 mph. The confidence rating shown with each result tells you how well the algorithm tracked that specific shot. Higher confidence = more reliable reading.
What iPhone models are supported?
Any iPhone that supports 120 FPS video works best (iPhone 13 Pro and later for 120 FPS; some models support 240 FPS). Older iPhones can run at 60 FPS with somewhat reduced accuracy. iPhone 11 or later is recommended.
Does it work on Android?
Not yet — The Hockey Lab is currently iOS only. Android support is on the roadmap. Sign up to be notified when it launches.
How do I calibrate for my rink?
Open the app and start a session. Tap the camera settings icon and select 'Calibrate'. Point the camera at your shooting zone, then mark two points with a known real-world distance (like the width of the crease, or the distance between two face-off dots). The calibration takes about 10 seconds and can be saved as a preset.
Can I use it without an internet connection?
Yes. The app works fully offline. Speed data, session info, and recordings are queued locally and synced to the cloud automatically when you reconnect. No data is lost.
How do I invite teammates to a project?
Go to the home screen and tap the menu icon. Select 'Manage Projects', then tap your project. Under 'Members', tap 'Add Member' and enter their email address. They'll receive an invite and can join instantly.
What does the 'confidence' rating mean?
Confidence reflects how cleanly the algorithm tracked the puck. It's based on the number of frames the puck was visible, how well the trajectory fit a straight line, and whether multiple tracking hypotheses agreed. A confidence of 90%+ is excellent; below 60% may indicate a partial detection or difficult lighting conditions.
What do I need besides my iPhone?
Nothing required. Any stable surface to prop the phone on works — a tripod is ideal but a board ledge, water bottle, or puck bag works fine. The app does all the processing on-device with no additional hardware.
Can multiple people track shots in the same session?
Yes. Any team member can join an active session. Multiple people can trigger shots simultaneously, and all speeds are attributed to the correct device and user.
Is my data private?
Your speed data and sessions are stored in your personal account. Team members in a shared project can see each other's session data. We do not sell or share your data with third parties. See our Privacy Policy for full details.