Your AI fast-bowling coach

On iPhone: open Camera, swipe to Slo-Mo, and record. On Android: look for Slow motion or Super Slow-mo in your camera modes. Higher frame rates improve fast-motion and timing coverage.

Start with the phone steady at hip height, side-on to the crease from your bowling-arm side, far enough back to keep your full body and delivery in frame. Record one delivery. If other phones filmed that same delivery from front- or back-on, add those clips too and label each view. Our step-by-step filming guide covers camera height, distance and the mistakes that cost you measurements.

No. One side-on clip is the classic starting point, and it supports the largest group of measurements: front-leg brace, back knee, trunk tilt, elbow opening, arm speed, delivery stride and foot strike.

Extra front- or back-on phones on the same delivery add the measurements a side camera physically cannot see, such as sideways trunk tilt and whether your run-up steps cross your own line. The sample analysis on this page came from three phones at once: the side-on clip returned 13 of its 15 measurements, and the two extra cameras added the rest. What extra cameras never do is get blended into pretend 3D. Every number names the single view it came from.

Your clips upload over an encrypted connection to private storage that only your account can access. They're processed to generate your analysis and kept so you can rewatch and compare re-tests. You can delete any video (or your whole account) at any time, and deletion removes the footage from storage.

No, and you should be suspicious of any phone app that claims it can. The ICC's 15° rule is about elbow extension, which official assessments measure with marker-based 3D motion capture in a biomechanics lab. Ordinary phone clips cannot measure elbow extension to that standard, so FastBowlingLab never issues legality verdicts. We show a visible elbow-opening cue from the side-on view, clearly labelled as a technique observation, and explain when a value is unavailable.

The native apps are available on the App Store and Google Play, so you can film, upload and read your analysis on the phone that shot it, with a push notification the moment it's ready. The web app does all of the same things in your phone's browser: same account, same analyses, nothing to migrate later.

Yes. Every analysis exports to a PDF designed for exactly that: your results, their sources, the explanations, annotated stills and the 4-week plan, in a format you can WhatsApp or email to a coach.

If the footage does not show a usable bowling delivery, for example it is too dark or the bowler cannot be tracked, the analysis unit you spent is returned. A usable clip from one view can still produce results, with view-specific rows explaining what was unavailable. Plans can be cancelled anytime: you keep access until the end of the period you've paid for.