YMX BOXING started by making hand wraps and heavy bags for serious fighters. The Reflex Ball Set with Counter App is their attempt to bring that same training mentality to casual home fitness. It’s a 4-pack of polyurethane balls in black, yellow, red, and green—each tethered to a headband strap. The material is durable enough to take repeated hits without scuffing or losing shape.

The real hook is the companion app. It tracks consecutive punches and logs your progress over time. You can join global leaderboards or challenge friends to beat your streak. The app gamifies the workout in a way that actually works—you’ll find yourself trying to hit 50 clean strikes in a row just to see your name move up the rankings. The headband fits snugly on most head sizes, and the tether length is adjustable, so kids and adults can both use the same set without frustration.

One thing to note: the balls swing unpredictably at first. That’s by design—it forces you to improve your hand-eye coordination. But if you’re expecting a smooth, predictable rhythm, this isn’t that. The learning curve is real, especially for younger kids (8-12). For anyone else, it’s a genuinely fun way to burn through 15 minutes of cardio without checking the clock. The app is free, and the balls show no signs of wear after weeks of daily use.