Hackmotion Sensor 4 Review: A Clever Training Aid That Will Straighten Your Shots

Like many of you reading this, I am always searching for that elusive feeling of consistency with my golf game, whether that be a full swing or on and around the greens. A major part of that comes down to clubface control, which is almost entirely dictated by something the majority of golfers overlook - your wrist angles.

Last year, I reviewed the HackMotion Sensor 3 and was hugely impressed by how effectively it helped me structure my wrists within the golf swing, and so, when the brand announced the new HackMotion Sensor 4, I was eager to get my hands on it and see what all the fuss was about.

Out of the box, the new device immediately felt and looked far more premium, like some of the best training aids. Where the Sensor 3 utilized a hard plastic body, the new Sensor 4 features a soft rubber housing that feels vastly more premium against the skin and is also around 25% smaller than its predecessor.

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One of my sticking points with the older model was that it felt fairly unnatural on your wrist, and while the softer rubber feels nicer to touch, the elasticated band that runs around your palm was a little tight, and there was no adjustment option.

It does fit well under the glove, however, meaning once you overcome the awkward and slightly uncomfortable feeling of the device, you can swing away as you normally would for a range session.

Under the hood, HackMotion has doubled the processing power and RAM, upgraded to Bluetooth 6.0, and replaced the old simple buzzer with a linear haptic motor. This means the app is faster, the connection is flawless, and the vibration feedback you get when your wrists fall out of the optimal range is much sharper and more refined.

The feedback from the sensor to the app on my phone was immediate, showcasing the results of your latest swing within seconds - something I was really impressed with, making it one of the most responsive golf gadgets I've used.

Setting the new device up on the app was just as user-friendly as before, calibrating in a matter of seconds, and had me ready to be analysed just minutes after taking it out of the box.

In my testing, the data told me my wrist angles are fairly solid when it came to a full swing, albeit a little work needs to be done on the angles in my takeaway to stop the clubface from closing down. Because the real-time visual and audio feedback is so immediate (capturing at 800 frames per second), I could physically feel where my lead wrist needed to be during the takeaway to keep the green optimal boxes lit up on my phone screen.

However, when it came to putting, it's a different story. While my putting can get red-hot, it’s often the lack of consistency on the greens that sees my scores fluctuate.

I tested the Pro software tier, which unlocks HackMotion's putting analysis. The sensor was telling me I lose my angles in my wrists, flicking the putter head through the ball at impact. It was a lightbulb moment for me, breaking down my wrists is exactly what leads to my inconsistent pace and start line control when under pressure on the greens.

Having that data laid clearly in front of me, alongside interactive drills to help quiet my hands during the stroke, was amazing to see and has certainly given me more motivation to practice ahead of my season really kicking off.

It's worth noting the pricing structure if you're looking to invest in this virtual coach. The base Core package ($345) gives you everything you need for the full swing. The Plus package ($490) adds the brilliant putting features I mentioned above, while the Pro package ($985) unlocks Tour player comparisons, advanced metrics, and multiple profiles for coaches.

Overall, the HackMotion Sensor 4 is a really useful tool that can give you great insight into what you need to work on in your game. Even if you only use it to check in and monitor things a few times a month, the ability to instantly diagnose a destructive flick or a cupped wrist makes it a brilliant addition to your practice sessions, all while giving you drills and things to work on to keep your practice as purposeful as possible.