ShadowSwing The swing trainer for tennis, padel and pickleball

It works on any iPhone running iOS 17 or later and on Android phones running Android 8.0 or later. The app reads the accelerometer and gyroscope: every iPhone that supports iOS 17 has both, and Google Play offers ShadowSwing only to Android devices that have both. It is made for phones: there is no iPad, Apple Watch, Wear OS or web version.

No. You hold the phone itself like a racket handle: the top of the phone is the racket tip and the screen is the string face. You need about two meters of clear space around you and nothing else. For the drills themselves, see our guides to shadow swing drills and practicing tennis alone at home.

It means the racket head reached real speed through contact, the kind a loose wrist and a whip give you without forcing it. A slow, pushed swing stays silent on purpose: the silence is the feedback. That one sound is the whole idea of the app; everything else (workouts, the 3D replay, racket speed) is built around it.

Yes. Pick your sport in the app and everything follows it: the replay shows a padel racket on a glass-walled court, or a pickleball paddle and the kitchen line, the head-speed lever matches the shorter racket, and the swing sensitivity starts easier for those two sports because the strokes are shorter and quicker. You can adjust it in Advanced settings. See our guides to padel training at home and pickleball practice at home, both without a court.

A workout is a list of blocks: a stroke and a number of reps, a stroke for a set time, or a rest. A coach voice calls each one — "Forehands. Twenty. Go." — each hit counts a rep, and rests are timed for you. The app does not watch you, so it cannot verify that you actually hit a backhand; it counts a rep whenever the racket head is moving fast enough. Doing the stroke it asked for is on you. There are presets for tennis, padel and pickleball, the voice speaks English, French and Spanish, and you can turn it off and let the haptics carry the cues. With Pro, workouts are unlimited and you can build your own.

Yes. A ring on the Home screen fills toward a daily swing goal you pick, and Free Hitting and workout swings both count; it starts empty each morning. Stats keeps your lifetime numbers: total swings, sessions, workouts, days practiced and your current and longest streak. With Pro, Stats adds graphs of your swings per day, week or month, your racket-speed trend for each sport, a practice calendar, your stroke mix and time practiced, all the way back to your first recorded day. Optional reminders send one nudge at the time you choose on days your ring is still open, never more than one a day. Everything is kept on your phone.

Bluetooth audio adds latency on any phone, and the whole point of the app is that the sound lands exactly at contact. The delay comes from the Bluetooth link, not the phone brand. Wired headphones or the phone's built-in speaker give the tightest hit sound; Bluetooth will feel a beat behind.

No. There is no ball. The app estimates racket-head speed from the phone's own motion: the accelerometer gives how fast your hand is traveling, and the gyroscope adds the rotation, because a racket head sits roughly 55 cm past your hand and sweeps a wider, faster arc when the wrist snaps. That extra is the whip the app trains. Treat it as a consistent number to improve against, not a radar reading, and do not compare it across sports — a padel racket and a pickleball paddle are shorter, so the same swing reads lower. The app explains all of this on a "how this is measured" screen.

Yes. Motion data is processed on the device and never leaves it, and so do your stats and daily goal. There is no account, no server, anonymous usage counts and crash reports only (can be turned off) and no other third-party SDK. Purchases are handled by Apple on iPhone and by Google Play on Android.

No. ShadowSwing trains the timing and release of your swing when you cannot get to a court. It cannot see your grip, footwork, stance or contact point, and it is not coaching advice.

ShadowSwing is free to download and needs no account. Some use is limited until you upgrade. ShadowSwing Pro (7-day free trial on the yearly plan) removes the limits and unlocks everything: unlimited swings, every preset workout, unlimited, plus the workout builder, racket-head speed on every swing with an all-time record, progress graphs with a practice calendar, any daily goal, unlimited replays, the full recorded sound pack with shuffle, Dynamic hit for tennis (the ball sound follows how hard you swing), your own sounds, and sensitivity tuning.

ShadowSwing Pro is Yearly at $39.99 USD with a 7-day free trial, about $3.33 a month and best value, or Monthly at $4.99 USD, cancel any time. Prices vary by region.

14 languages on iPhone and Android: English, French, Spanish, German, Indonesian, Italian, Dutch, Swedish, Portuguese (Brazil and Portugal), Japanese, Korean and Chinese (Simplified and Traditional). The coach voice speaks English, French and Spanish.

Subscriptions are managed in the store you bought them from, not in the app: on iPhone in your Apple ID settings, on Android in Google Play (Payments & subscriptions > Subscriptions). Refunds are handled by Apple through reportaproblem.apple.com, or by Google Play on Android; we cannot issue them ourselves. See support for the steps.