SwingShadow - Tennis Analysis

Film your practice from behind the court and import the clip. SwingShadow finds your forehands, backhands and serves, and cuts the session into swing-by-swing clips.

WHAT YOU GET

• A session timeline, color-coded by stroke type. Tap a swing to jump to it.
• A filter that narrows the session to one stroke, so you can watch every serve back to back.
• Slow motion and loop on a single swing, with a skeleton overlay that tracks your joints frame by frame.
• Stroke counts on every video in your library, so you can spot the serve-practice day without opening it.

COMPARE SIDE BY SIDE

Put two swings from your library next to each other, synced at the moment of contact. SwingShadow zooms both panes to keep the players the same size, so posture differences stand out even when the camera distance doesn't match. Watch last month's serve next to today's and see what changed.

SHARE THE GOOD ONES

Select your best swings and export them as one clip, with the dead time between them trimmed out.

RUNS ON YOUR PHONE

Your phone does the analysis, in the background, with a progress notification. No account, no ads, no upload. Every feature is free. Airplane mode works fine.

If detection mislabels a swing, fix it in two taps. The app asks before sending us that correction, and we delete uploads after 90 days, or right away when you tap "Delete shared clips" in Settings.

IN THE LAB

An experimental compare mode shows how closely each swing tracks a chosen pro's movement. It measures resemblance, not skill, and we are still calibrating it, so it ships switched off. Turn it on under Settings → Experiments if you're curious.

HOW TO FILM

Put your phone on a tripod behind the baseline, with your whole body in frame. SwingShadow reads back-view footage; side and front views aren't supported.