Motion study · 240 frames per second · all on-device

See the swing you actually made.

Strobe records your golf swing at up to 240 frames a second, finds the positions that matter, and lets you stand on any single frame — on your iPhone, where all of it stays.

Range study 01 · wedge, down the line · 239.9 fpsShot on iPhone · analyzed by Strobe
Address, frame 0287F 0287
Address
Takeaway, frame 0416F 0416
Takeaway
Top, frame 0531F 0531
Top
Downswing, frame 0584F 0584
Downswing
Impact, frame 0618F 0618
Impact
Finish, frame 0744F 0744
Finish

Your eye refreshes about thirty times a second. A downswing is over in a quarter of that.

Whatever you think you did at impact, you are remembering a feeling, not a frame. Strobe keeps the frames — impact isn’t a guess, it’s F 0618.

Index
01CaptureRecord at the highest frame rate your iPhone offers, start and stop from your Apple Watch, or import slow-motion clips you already shot. The sound of the strike finds the swing and cuts the clip to it — a bucket filmed in one take lands as one clip per swing.240 fps
02TrackingBody pose on every frame, computed on the Neural Engine. The skeleton and joint angles draw over the video as it moves.19 joints
03CheckpointsAddress, takeaway, backswing, top, downswing, delivery, impact, follow-through and finish, found on their own and named as you scrub. Drag one if the app got it wrong and everything recomputes.9 events
04TracersThe club's own path through the swing, tracked while the clip is analysed and drawn the moment you ask. For the ball, tap it at impact and at the top of its flight and physics fills in the rest, in three broadcast styles.club · ball
05CoachOptional, and off until you switch it on — with Strobe Pro, or with your own Anthropic, OpenAI or Google key. Every finding is pinned to a checkpoint: tap it and the player stands on that frame. It reads measurements and a few stills; the video stays home unless you choose to send it.pro · byok
06SessionsA bucket at the range stays one session, not forty camera-roll rows. Compare two swings in drift-free sync. Export one clip or a whole session.in sync
07YouEvery session leaves numbers behind. The app keeps your typical band for each club type and says, quietly, when today sits outside it.by club
In the app
Strobe parked at the top of a wedge swing, the skeleton drawn over the golfer and the club traced through the backswing, with the impact frame marked in orange on the timeline.
Fig. 01 — one frame, the body drawn, the club traced
The coach walkthrough stopped at impact: the golfer's head circled in orange with a mark reading 5.0 cm down, and under the frame the finding "Head drops into the strike", sixth of six.
Fig. 02 — the coach, stopped on the frame it is talking about
Strobe comparing two swings side by side across a centre seam, both locked on their impact frames.
Fig. 03 — compare, two swings locked at impact
The measurements panel open over the video: tempo 2.6 to 1 with the backswing and downswing under it, club speed withheld as not measurable from behind, and spine and head numbers below.
Fig. 04 — the numbers, with the estimates named as estimates
The Strobe library, swings grouped into range sessions by day, each cell showing its club and duration.
Fig. 05 — the library, a bucket at the range is one session

Nothing leaves your phone.

No account, no subscription, no analytics. The one thing the app sends anywhere is a coaching review, and only when you ask for one: measurements and a few stills, to Strobe’s coach with Strobe Pro or straight to your own AI account. The video goes only if you switch that on yourself.

The whole privacy story →
  • Your videostays on device
  • Analysison-device, neural engine
  • AI coachStrobe Pro or your own key, off by default
  • Accounts / trackingnone / none
iPhone · iOS 26 or later

Stop arguing about the moment. Stand on it.