Coaching staff.

The roster.

Film a few swings, get one thing to work on. Every player keeps a history, so next time the advice picks up where you left off.

How to film it thirty seconds of setup buys a much better read

Stand on the open side — where you can see the hitter's chest and number, square to them, about 15 ft away.
Phone at belt height, held still — lean it on a bucket or the fence. A moving camera reads as a moving hitter.
Landscape, whole body in frame, head to feet, with room in front for the stride.
Slo-mo if the phone has it. 60 fps or better sharpens every timing number. 30 fps still works.
One swing per clip, a second or two on each end. Four to six swings makes a session worth trusting.

What this can and cannot see. It tracks the hitter's body — 33 joints, every frame — so it reads stride, balance, head movement, rotation and front-side mechanics well. It does not track the bat or the ball: on phone video the bat is a blur at contact, so anything claiming bat speed or exit velocity from a clip like this is guessing. Contact here is estimated from hand speed.

Where this lives

Everything stays on this device — no account, no upload. Checking how durable that is…

—

History

Notes on this player

Guardian

Name

Phone

Email

Stays on this device. Never uploaded.

Kept swing data

—

Today's swings.

Four to six swings gives a reading worth trusting. One swing is mostly noise.

Drop a swing here or tap to record

Line up the clip.

Trim to the swing

Scrub to just before the load and set the start. Then just after the finish and set the end. A tight clip reads faster and cleaner.

0.00s

What they were hitting

Mechanics change with what is coming at them. Tagging it keeps the history comparing like with like.

Where you filmed from

Camera angle Open side facing their chest Behind the plate down the pitcher line Down the line from a dugout

Reading it.

Warming up…

The first run downloads the pose model, about 9 MB. After that it is cached.

Swing 1.

This swing

One thing to work on

—

The drill

What looked good

Then, later

Notes from today

The measurements

What	Reading	Wants to be	Call

Before you coach it

Give them one cue, not four. Lead with what looked good — it buys the attention for the fix. Five to ten minutes on the drill beats thirty minutes of swings, and expect the change to look worse before it looks better. If anything hurts, stop: this reads mechanics, not arms and joints.