Shuttlecock kicking, quantified
Rallies and kicks from an AirPod on the shuttlecock
Strap an AirPod flat to the base with a rubber band, feathers up, and play. Rallies count themselves: kicks, airborne time and your kicking tempo, rally by rally.
Jianzi is part of the Kinapod app, free for now. Works with AirPods Pro (2019 or newer) and standard AirPods (3rd generation or newer).
In the app now
Automatic rallies
Flight is unmistakable to the sensor: in free fall it reads zero g. A rally starts at your first kick and ends when the bird lands.
Kicks and hang
Kicks per rally, airborne time per rally, and average hang per kick, all charted in the summary.
Idle time
How much of the session the bird spent on the ground instead of in the air. Watch it shrink.
Introduction
Jianzi is one of the world's oldest kicking games and nobody has ever counted it properly. Kinapod straps a motion sensor to the bird itself: every flight, every kick and every drop is in the data.
What it measures
- Rallies, started by your first kick and ended when the bird lands.
- Kicks per rally, with a big live counter during the rally and a best-rally record.
- Airborne time per rally and average hang per kick.
- Tempo in kicks per minute of active play, and idle time in between.
Kinapod is a practice and training aid. Metrics are estimates derived from motion sensors and are not a certified measurement instrument.
How to use
- Strap one AirPod flat against the side of the base disc with a rubber band, feathers up, snug so kicks cannot shift it.
- Keep the second AirPod out of its case, near the phone.
- Pick Jianzi and play. Rallies, kicks and airborne time count themselves; a wrong detection can be cleared with one tap.
Want your rallies on record?
Jianzi is in the Kinapod app now, free for now.