Frequently Asked Questions
You don't need to! The sensor is generally always on, waiting for you to start playing. As soon as it sees a shot or two it will wake up fully and start recording your match or practice. After you finish playing it will turn itself off again after about 5 minutes without any shots being played.
You may notice the sensor waking up inadvertently if you shake or bang your racket off court. No problem - it will quickly go to standby again as soon as it sees you are not playing. Nothing will get synced in this case.
The initial docks that hold the sensor on the racket are not perfect, and it can be difficult to remove the sensor. You have to try and tilt it up and back at the same time as holding down the clip that secures it in place. We will have new docks soon that solve this issue.
If you leave a 5 minute gap between matches or practices, then your sensor will switch off automatically and the next match you play will be recorded as a new match. If you want to go straight from one match to another, you need to sync your data in between or all the data will be counted as a single match.
At present, the date and time shown on each practice or match is from when you uploaded it, not when it was recorded. Syncing your data soon after playing will keep the dates and times close to that when the match was played.
If the battery runs down, then the sensor won't wake up any more when you start to play - you need to re-charge it first. Simply plug it into a power source via the USB cable supplied and it will re-charge itself. The red LED comes on while recharging and goes off when fully charged. Once charged (which takes a couple of hours for a full charge), you should be able to play for around 10 hours before needing to charge again.
No problem. You will need to remember your PIN (it's printed on the underside of the sensor), but apart from that you just need to install the app on your new phone and it will bond with your sensor when it start up. Then when you next sync it will get ALL the data from your sensor and you are done. Note that each sensor can only be bonded to one app at once.
We test the system extensively as part of the development and in the lab we currently get 97.75% accuracy for the basic classification of shots into rallies. Of course we're working hard all the time to collect more data and improve the algorithms (based on the latest Machine Learning and Artificial Intelligence techniques) and squeeze out every last percentage.
To determine the winner/loser of each rally we need to figure out who serves. This can be hard to do because a serve and a receive often look similar in terms of the swing. So we determine who serves by looking for ball bounces shortly before the first shot of each rally. Many people do this instinctively so it's no burden - but you can help make your win/lose data accurate by making sure you bounce before you serve.
We use your personal data primarily for determining your calorie burn. This means that the figures you get from us are adapted to your specific gender, age, and weight. Without this, they would be much less accurate. In addition we need to know your handedness (left or right handed) in order to map shots into backhand and forehands correctly.
No - the sensor works totally stand-alone. You can play any number of matches without your phone being present, and then sync them to your phone next time you have it. If you do it this way, remember to wake your sensor up by plugging it in (and get the blue light on) before you sync your data.
No, once you start the sync process you can go to any other screen - or even turn your screen off - and the sync will continue. You must keep your phone relatively close to your sensor though - up to about 10 or 20 meters depending on the environment.