You service is unreliable? Watch yourself serving! Find your mistakes and improve your technique using this simple app.

The way it works is very simple: The app gives you a life view with a delay of 5 seconds: You serve, then you watch your motion. Then you serve again and watch your motion again.

You don't have to press any buttons or any other steps to operate the app. It's like a mirror, but with the difference, that your mirror image is always delayed. The delay is configurable from 1 to 10 seconds.

Just watch yourself, what you did a couple of seconds ago.


Why did you call it Tennis-Q?

The name originates from one of our other apps: CU-Q. "CU" is the abbreviation for "See you". The video runs through a queue for being delayed. That is were the "Q" comes from. The Tennis-Q is the CU-Q application modified for tennis players.

How can I fix my tablet on the floor?

There are plenty of stands for your prefered device (tablet or smartphone) available on the market. Often these stands are very fragil. Therefore we developed a stand for rough environments like the tennis court.

You find the product here:

Stand for the Qs Stand for the Qs

Can I increase the resolution?

We want to make the video as smooth as possible on as much different devices as possible. The chosen resolution gives satisfying quality and is compatible with many different devices. Although we think it is sufficient for all uses cases, we are trying to support even higher resolutions in future versions.

How long does the battery last?

Tennis-Q has to process high volumes of data. Furthermore, Tennis-Q is often used outdoor, so the display brightness will be driven to the maximum. Both don't are good preconditions for a long lasting battery.

Here are some guideline values of battery life from selected popular devices at highest display brightness level. We discharged every device from 100% to 50%:

Device Battery Life (50%)
iPhone 5 1h 30min
iPad 3 2h 0min
Samsung Galaxy Tab 2 2h 15min
Lenovo Yoga 10 3h 0min

Why is the image jerking?

On some Android devices the image may sometimes jerk or even stand still for some seconds. That is not good and we are aware of this lack of quality. We are working hard to improve this behaviour in future versions. Nevertheless we think, that it is not affecting the use case the app is made for.