How does Video Overlay compare two clips?

It has four views: Side by Side, Overlay, Video + Lines and Merged. You can load the same athlete on two days, or a player next to a model rep.

Does Video Overlay measure joint angles?

Yes. It measures joints such as the lead and back elbow, shoulder, knee and hip, plus spine tilt, shoulder line and hip line. Angles come from a single camera, so compare clips filmed from the same spot. They are a coaching reference, not a clinical measurement.

Is my video uploaded anywhere?

No. Everything runs on the device and no frames are uploaded.

How much does Video Overlay cost?

Video Overlay is a one-time $59.99 purchase for iPhone and iPad, with no subscription.

Real swing · real skeleton · traced by the app

See the motion behind the motion.

Video Overlay traces every joint with on-device AI, lays two reps on top of each other, and measures exactly what changed. Any sport. Any level.

Download on the App Store See it work

$59.99 once · iPhone & iPad · no subscription

Rep 1 Rep 2 Frame 000

Lead Elbow —→——

Lead Hip —→——

Drag to orbit 360°

The problem with video

Film shows you that a rep was different.
Video Overlay shows you how.

Two swings can look identical at full speed and be twenty degrees apart at contact. Pull the skeleton out of the footage, stack the reps, and the difference stops being an opinion.

Four ways to look

One clip is a video.
Two clips is a lesson.

Load two reps — the same athlete on two days, or a player next to a model rep. Then switch views in a tap.

Side by SideTwo panes, one shared clock. Trim both reps side by side and match their lengths to the frame.
OverlayStack the reps with adjustable opacity. Align them on body points like the lead foot and head.
Video + LinesThe skeleton drawn right on the athlete, with angle arcs at the joints you pick.
MergedBoth skeletons on one canvas, no video — the pure difference in posture.

Video Overlay on iPhone comparing two softball swings side by side, with trim controls for both clips

Real screen · iPhone

Video Overlay measuring lead elbow and lead hip angles on two batting-cage swings

Real screen · live angle readout

Angles, not adjectives

“Stay connected” becomes +20.3°

Pick the joints that matter to your sport and Video Overlay measures them on every frame, for both reps, with the difference right beside them.

Lead ElbowBack ElbowLead ShoulderBack Shoulder Lead KneeBack KneeLead HipBack Hip Spine TiltShoulder LineHip Line

Plus plumb and ground reference lines, and your own colors for every bone and arc. Angles come from a single camera, so compare clips filmed from the same spot — they are a coaching reference, not a clinical measurement.

The view nothing else gives you

Different phones.
Different distances.
Same skeleton.

Video can only be overlaid when two clips were filmed the same way. Skeletons can always be. Merged mode anchors both athletes at the hips and scales them to the same torso length, so what's left on screen is posture — nothing else.

19body points tracked per frame

0frames uploaded — it all runs on the device

Merged skeleton view on iPad with angle labels for both reps

Real screen · iPad

Built for every sport

If the camera can see the athlete,
Video Overlay can measure the motion.

SoftballHand path and lead-hip opening, rep against rep.

Drag · swipe · 360°

Coaching and training at every level

From the first practice
to the highest level.

01 · Youth & rec

Show it, don't shout it

Kids can't feel "stay closed." They can see their skeleton next to yours. Freeze the frame, point at the line, done.

02 · High school & travel

Proof of progress

September's rep against March's. Parents, players and recruiters see the change in degrees, not adjectives.

03 · College & pro staff

Quantify the tweak

Did the adjustment hold under game speed? Measure the same joints across reps and keep the numbers honest.

04 · Private instructors

Before and after, in the lesson

Film the first rep, film the last, merge them before the athlete leaves. Save the comparison straight to Photos to send home.

05 · Athletes on their own

Your best rep is your coach

Put today's swing on top of the one that felt perfect and find exactly where it drifted.

06 · Strength & movement coaches

Form you can measure

Squat depth, hip hinge, spine tilt, landing mechanics — the same tools work for any movement a camera can catch.

How it works

Three taps from film to finding.

1
Load two reps
Pick any two clips from your library — filmed on any iPhone or iPad. Trim each to the motion that matters.
2
Trace & line up
Video Overlay traces the joints on-device. Line the reps up on body points, shift either one a frame at a time, then play both at 0.25×, 0.5× or 1× or step frame by frame.
3
Save what you see
Video with lines, lines only, or merged skeletons — the saved video matches the screen exactly. Share it with the athlete in seconds.

Unedited screen recording

On-deviceEvery frame is read on your iPhone or iPad. Nothing is uploaded.

No accountOpen it and go. No sign-up, no login.

No adsNothing between you and the film.

No subscriptionPay once and every feature is yours.

One price. Yours for good.

$59.99

one time · no in-app purchases

Side by Side, Overlay, Solo and Merged views
On-device skeleton tracing with 11 angle measurements
Sync, trim, 0.25× slow motion and frame stepping
Save exactly what's on screen to Photos
iPhone and iPad

Download on the App Store

Requires iOS 17 or later. Charged to your Apple Account. Price in USD; may vary by region.

Stop guessing
what changed.

Get Video Overlay

See the motion behind the motion.

Film shows you that a rep was different.Video Overlay shows you how.

One clip is a video.Two clips is a lesson.

“Stay connected” becomes +20.3°

Different phones.Different distances.Same skeleton.

If the camera can see the athlete,Video Overlay can measure the motion.

From the first practiceto the highest level.