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Under good conditions — proper calibration, decent lighting, and a stable camera — accuracy is typically within 2 mph.

iPhone 13 Pro and later supports high-speed 120 FPS video, which is required for accurate speed readings.

Yes — The Hockey Lab is available on both iOS and Android. Android requires a one-time camera calibration on first use. A prompt appears on the Home screen — just follow the steps to complete it.

To calculate speed accurately, the app needs to know the distance from the phone to the shooting lane. Open the speed-tracking screen and tap the gear icon to open Tracking Settings. Under Camera Distance, you can either enter the distance manually or use 'Measure with camera' — point at your shooting zone, frame an object of known length, drag two points to mark its ends, and enter the distance. Save it as a preset so you never have to do it again for that rink.

Yes — that's what presets are for. Each preset stores your camera distance, detection sensitivity, zoom, crop zone, speed unit, and voice settings. You can create as many custom presets as you need and switch between them instantly from the Preset Selector screen. Any changes you make in Tracking Settings are saved back to the active preset automatically.

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.

From the Home screen, tap the menu icon and go to your team's settings. Tap 'Add Member' and enter their email address or username. Note: the person must already have a Hockey Lab account before they can be added.

A few options depending on your setup. You can enable voice announcements in Tracking Settings. The app reads each speed aloud through the phone speaker or any connected Bluetooth headphones. For a bigger display, enable Observe Mode (eye icon on the tracking screen): open thehockeylab.com/observe on any browser and enter the short code shown. At a rink, an iPad mounted to the plexiglass with a suction cup holder works great. At home in the backyard or driveway, a nearby tablet or laptop does the job just as well.

The phone must be still while tracking. A tripod works well, and suction cup phone mounts are a great option at a rink since they attach directly to the plexiglass. The app does all processing on-device; no extra hardware is needed.

Yes. For teams, everyone's shots are tracked together in the team's speed list. The app can't automatically detect who is shooting, but you can manually tag each shot with the shooter's name.

The app includes a 14-day free trial with full access. After the trial, you can continue on the Free plan (50 shots with replays per month, 1 device, no teams) or subscribe to Lite (500 shots/month, 2 devices, up to 5 teams) or Team (unlimited shots, 5 devices, unlimited teams). Speeds are still detected after the monthly replay limit — they just aren't saved. Subscriptions are managed through the App Store (iOS) or Google Play (Android).

Your speed data and sessions are stored in your personal account. By default, speeds and replays are shared publicly on the feed — you can turn this off at any time under 'Share speed results publicly' in Privacy Settings. We do not sell or share your data with third parties. See our Privacy Policy for full details.