Badminton Smash Power Trainer

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.