Calibration and Data Accuracy

Learn how to properly calibrate the HackMotion sensor to ensure reliable and accurate data measurements. You will be prompted to calibrate every time you start a new practice session.

Note: All HackMotion sensor versions use the same HackMotion app, and the calibration process is the same for all of them. You may see a different model in the instructional materials.

Step 1: Place your wrist in a flat straight position in front of you, parallel to the ground. Try to make sure that your wrist is flat in relation to your forearm. The position of your wrist in this step will be considered as 0 degrees. Press It’s in position

Step 2: Without rotating your forearm lift it approximately 30 – 45 degrees. Focus on lifting your arm without any movement to the sides. The app will automatically capture the motion and will complete the calibration.

To check if the sensor is properly calibrated, you can examine if your wrist is comparable to the  flat wrist of the 3D model.

When to Re-calibrate Your Sensor?

After calibrating your sensor, you can always re-calibrate it at any moment during your practice session. If the 3D model or data you receive after each shot doesn’t make sense or drills are not working correctly for you – recalibrate the sensor. Always recalibrate if the sensor shifts or moves on your wrist. 

NOTE: You can ignore minor differences of a few degrees (+/- 5 degrees), because it is impossible to always place the wrist perfectly straight.

What to Do When Data is Changing Significantly From Swing to Swing?

It depends on how much your data is changing. For example, a 5-degree change is insignificant and often happens when you re-grip your club at the address. If the data is changing more than that and you have not changed how you grip the club, double-check that the sensor is put on tight enough so that its not moving on your wrist.

Troubleshooting tips

When calibrating, your wrist must start from a flat & straight position. The most comfortable way to get a flat wrist is by making a fist with a flat top.

If your wrist is not flat, the calibration will not be accurate and the feedback received through the app will likely have issues. Common issue during calibration is extending the wrist (cupping) during the first step.

Make sure that during the first step your arm and hand are parallel to the ground, so that both parts of the sensor are pointing straight up. Avoid rotation – the sensors should not face away or towards you at any point of the calibration process. Do not use flat surfaces to assist with the calibration – it is safer to gauge the wrist position visually.

When calibrating – slowly lift your forearm to a gentle angle of approximately 30 – 45 degrees. Focus on keeping your elbow steady (don’t move your elbow) without any inward or outward movement of your arm. The exact degree to which you lift your forearm does not matter, but it is recommended to aim for moving your hand approximately halfway upward.

If you have doubts about data accuracy or have trouble finishing the calibration process with confidence, you can try holding the initial position higher – for example, closer to the chin level. It will be easier for you to notice if the wrist is truly flat from this position.

If you notice that the calibration seems unreliable or does not reflect your actual wrist movements, please reach out to HackMotion support and describe the issue. You may be asked to provide a video of your calibration process – this not only lets us identify the potential cause much quicker, but also helps improve the calibration process in the future updates.