Observed arrival · 2026-09-19
ShadowSwing: A Phone That Pretends to Be a Racket
An iPhone swing trainer for tennis, padel, and pickleball that turns wrist release into a timed hit sound.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Tennis, padel, and pickleball players practicing without a court
- Worth noticing
- The phone tracks swing motion on-device and triggers a hit sound at the claimed wrist-release moment.
Field notes
The site describes a motion-feedback loop rather than a conventional video coaching system: the phone is held as a racket handle, motion sensors track the stroke, and a sound marks the detected release. A 3D analysis mode is said to show swing path, string-face orientation, and peak racket-head speed. The page also records important exclusions: it does not infer ball behavior or correct body mechanics, and the stated platform is iPhone only.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue