TennisLooker: Tennis Tracker

Wear your Apple Watch on court and every swing is recorded: forehands, backhands, serves, overheads, swing speed, heart rate and calories. Data stays on your devices.

Wear your Apple Watch on court and TennisLooker records every swing. Your watch taps once for each swing it counts, and the full report is waiting on your iPhone when you finish.

AUTOMATIC SWING COUNTING AND STROKE RECOGNITION • Swing count: backswings and follow-throughs are not double-counted, and you can check every swing on the spot • Stroke types: forehand, backhand (two-handed, one-handed and slice counted separately), serve, overhead and volley • Learns your strokes: a few minutes of calibration teaches the watch your own forehand, backhand and serve • Three counting sensitivity levels you can adjust yourself

SWING SPEED AND BODY DATA • Top and average swing speed for every stroke type, plus the distribution; calibrate it with a radar reading in one tap • Live heart rate, heart-rate zones, active and total calories, distance covered • Heart-rate recovery between games and rally length

MATCH SCORING • Singles and doubles scoring with advantage and tiebreak, with undo • The first shot of a point counts as a serve, overheads during the rally are counted separately

REVIEW ON IPHONE • History, detailed session reports, weekly and monthly trends (including serves, ball speed, slices, volleys and overheads) • One-tap share posters with the app watermark • Four court themes: grass, clay, hard court and night

PRIVACY Everything stays on your watch, iPhone, Apple Health and your own iCloud (so it comes back on a new phone or after reinstalling). The developer has no servers and cannot see your data, no account is needed, and there are no ads.

REQUIREMENTS • Apple Watch with watchOS 10 or later, worn on your racket hand • iPhone with iOS 17 or later for history and trends; the watch app also works on its own and syncs when your iPhone is nearby • Series 8, Ultra and newer sample motion 200 times per second; earlier models 100 times per second

The app interface is currently in Simplified Chinese.

TennisLooker is not a medical device. Heart rate, calories and swing speed are for sports reference only.