Badminton Smash Power Trainer

Swing Speed & Wrist Snap Coach

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

New: speed analysis finds what makes your smash faster, with 2D/3D swing replays and leaderboards. Your music keeps playing while you train. Hear the snap when your swing is right. Strap your iPhone or Apple Watch to your forearm and swing like a smash. A physics engine simulates the weight inside a whip-power stick: only a real accelerate-then-brake swing makes it crack. Every swing gets a speed, a grade and a voice call-out, so you know instantly whether that rep counted. FIND YOUR SPEED KEY • Speed analysis compares your fastest and slowest swings and names the one thing that makes you faster: forearm rotation, rotation speed, time to peak force or brake sharpness • Research-based tips and a drill for your next session SEE EVERY SWING • Swing detail with a 2D phase curve and a 3D path you can rotate • Session speed chart, plus a daily progress chart for each weight • History keeps your recent swings COMPETE • Leaderboards for each weight, filterable by country, with rank medals to climb • Optional Sign in with Apple keeps your name and records when you switch phones TRAIN YOUR WAY • Light, Medium and Heavy weights for beginners to advanced players, or tune mass, tube length and friction yourself • Snap sound, voice feedback and Apple Watch haptics • Music and videos from other apps keep playing while you train • Apple Watch app for hands-free training • 13 languages Great for smash, clear and wrist-snap practice at home, at the club or anywhere. Free to use. An optional one-time purchase removes ads.

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• Music and videos from other apps (such as YouTube) now keep playing while you train. The snap sound and voice feedback play on top. • Voice feedback can now be heard even when the phone is in silent mode. Turn it off any time in Settings. • Fixed labels that could be cut off on the home and history screens.

The developer, zhenyu song, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data
  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • Identifiers
    • Usage Data
  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
zhenyu song
Size
43.9 MB
Category
Sports
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
  • Apple Watch
    Requires watchOS 9.0 or later.
Languages
English and 12 more
  • English, French, German, Indonesian, Japanese, Korean, Malay, Portuguese, Simplified Chinese, Spanish, Thai, Traditional Chinese, Vietnamese
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Zhenyu Song