The DigiBall is a digital billiards ball that measures the accuracy of your stroke so that you can compare it to your intentions. Novice players may not give any thought to the importance of where on the face of the cue ball they hit it, as long as the cue ball makes the object ball go in the pocket. But for any high level of play, it is extremely important. Hitting the ball too much on one side of center will cause it to deflect in the opposite direction of your aiming line, resulting in a miss. Advanced players know this, and use the deviation in combination with deliberate tip offset to both pocket the object ball and spin the cue ball off of the rails into desired positions. But again, deviations in the accuracy of the deliberate off-center tip hits cause poor results. By obtaining real time feedback on where you actually hit the ball and comparing it to where you intended to hit the ball, you can make permanent adjustments quickly.

Yes. The ball is manufactured by Aramith to a sphericity of 0.025mm +/- 0.05mm per Aramith standards.

Yes. The ball is perfectly balanced resulting in zero roll-off.

Yes, the DigiBall is designed to withstand unlimited break-speed shots.

Yes. The ball is manufactured by Aramith to the same weight standards as a normal Aramith cue ball.

Yes. The ball is made from Aramith phenolic resin.

No. The DigiBall uses the direction of gravity while at rest as a reference and requires no manual alignment, ever.

No, the DigiBall does not move on its own or pocket balls for you.

No, the DigiBall does not contain any moving parts or actuators that would cause it to alter its path in any way.

No, the rolling speed of the ball can not be electronically changed.

Yes. Rotational speed in RPS (rotations per second) is displayed for every shot.

Yes. Ball speed is calculated automatically. A higher accuracy is obtained after the distance between the ball and target is input into the app.

Yes. Exact tip location is displayed graphically, and as a percentage of ball radius from center.

Yes, the DigiBall app displays a plot of spin magnitude over time. The length of time that the DigiBall records data can be configured remotely.

No. The DigiBall has no idea how the cue stick moved. It only knows what the point of contact is.

Kind of. You will see a result with much lower spin than expected. However there is no precise detection between a miscue and a good hit.

Yes. The rate of change of spin magnitude over time (rpm/s), or the slope of the plot at a point in time, provides a measurement of rolling resistance (if rolling without slipping), and ball-cloth friction (slipping, i.e. a turn-over during a draw shot).

No, the DigiBall does not know the angle of the cue stick.

The DigiBall has no idea where on the table it is at any point in time. It has no external reference.

No, the DigiBall can not tell you the contact point of the object ball because there is no external reference for either the DigiBall or object ball to relate it to. It can however detect an impact event in time.

The DigiBall can not measure positional deviation from a straight line as it moves. It can only show the change in spin magnitude.

No, the DigiBall can not tell you where you need to aim at the object ball.

Yes, the app can display a scatter plot of multiple tip contact points from shots. Statistical information is also presented such as speed and tip position averages and standard deviations.

Yes, the app saves all shots to file as a history log. This file is exportable (sharable) at any time.

Yes, the DigiBall has a built in shot clock. The app displays a count-up or count-down to a selected time, a change of colors to indicate warnings, and an option for voice anouncements.

Yes. The DigiBall app has an option to announce the spin angle outloud.

The DigiBall does not give you this answer, but it will help you find it. By comparing where you intended to hit the cue ball, to where the cue ball was actually hit, you will become more aware of your stroke and pre-shot routine. This awareness will quantify your fundemental problems and lead to self-corrections. Additionally, pairing the DigiBall data with video allows you to share your performance with others, which will generate very helpful feedback.

The DigiBall comes with a proprietary wireless charger. Qi chargers will not work with the DigiBall.

Between 4 to 8 hours.

About 12 and 16 hours.

Thousands of times.

The DigiBall is planned to be available in pool, snooker and carom sized balls.

The DigiBall as a few reconfigurable parameters, such as what data is displayed in the app's plot and the data length, etc. It also has Over The Air firmware update capabilities. To enable the DigiBall for updates, perform the following gesture: Hold the ball in such a way that allows you to partially rotate back and forth while keeping the black dot stationary. Do this five times within  three seconds.

Data is exported from the DigiBall App in comma-delimited ASCII format:

epoch: Timestamp, milliseconds since Jan 1, 1970
rps: Spin Magnitude in rps
deg: Spin Angle in degrees
secsl: User-selected time with slider, between hit and impact, in inches
inch: User-selected distance with slider between CB and target, in inches
rpm: Spin Magnitude in rpm
tip: Tip Location in Percent Radius from Center
miss: True for success, False for miss
mph: Ball speed after hit, in mph
xmm: Tip location from center in the horizontal direction, in mm
ymm: Tip location from center in the vertical direction, in mm
bdmm: Ball diameter, in mm
tag: Session name / start of session
tagend: End of session