Calculate the initial speed of your tennis serve as shown on TV!

√ Calculates both Mph and Km/h
√ Record your serve at 240 FPS in HD quality!
√ Also calculates/tracks the time, distance, average speed, speed at bounce and direction.
√ Save results (keep track of history), compete against your friends and track your improvements over time!
√ Add multiple players and calculate the speed of your friends and opponents!
√ Save videos including the speed of each serve, analyze them in slow motion or frame-by-frame, and get instant feedback.

In-App update to compare yourself against the professional tennis players like Roger Federer, Rafael Nadal, Serena Williams, Pete Sampras and many other top ATP/WTA players and Tennis Legends.

Gain the privilege that formerly only the PRO’s could enjoy in their radar gun-equipped environment.

Test results made at the Australian Open:
2nd serve Novak Djokovic, Professional radar gun 156Km/h, ServeSpeed App 158Km/h
1st serve David Ferrer, Professional radar gun 197Km/h, ServeSpeed App 197Km/h
1st serve Victoria Azarenka, Professional radar gun 159Km/h, ServeSpeed App 156Km/h

The idea for this App originated from the Tennis Warehouse Community where more than 750 people up voted for this App to be made.

This App has been created with dedication and passion to improve the most powerful skill a tennis player can have: ‘the serve’. It uses advanced algorithms to calculate the initial speed (ISS), which corresponds to the speed shown on TV. The calculation is based on the position from where the ball was hit ‘till its landing location inside the service box. Holding in account the player’s height and most important the travel time of the ball. Taking advantage of the iPhone’s great camera, this App allows you to record your serve at 240 FPS (frames per second) that provides the best precision!

Using a simple 4 step intuitive interface, which includes the graphical representation of the court with a moving scale that will further enhance the precision of data entry, you can calculate the serve speed within seconds.

There’s a free feature in this app that allows you to save your serve videos including the speed and date. This will help you to keep track of your serve’s history, making it easier to review and compare them to your opponents.

Please feel free to contact us for any comments or concerns regarding this App.

What’s New

Version 3.2

This app has been updated by Apple to use the latest Apple signing certificate.

!- IMPORTANT NOTE => there is a problem with the app on the iphone 7 and 8: the app does not allow you to select and calculate videos in your camera roll. However you can instantly record and calculate serves! Due to sickness I currently cannot fix this, but I will come with an update later this year. :( -!
Improved accuracy by adding functionality that allows you to select the service box from the video frame, which makes it very easy to determine the exact bounce position of the ball!

Ratings and Reviews

3.3 out of 5
54 Ratings

54 Ratings

SpineTinglez ,

Can’t upload videos

I used this app on my iPhone 4s perfectly, then wanting to get more frame rate I purchased an iphone6. Unfortunately now the app doesn’t do its only function and will not let me upload any videos. The developer mentioned it doesn’t work with iPhone 7/8 like this. Apparently it doesn’t work with iPhone 6 either. This is incredibly discouraging and now it appears this app is a waste. Probably worth skipping over and trying one of the many other radar apps out there.

ighkakahahsKkKzkz ,

Doesn’t work

For iPhone 7 and 8 the app does not allow you to upload videos as the developer acknowledged. However, it also doesn’t let you record because it tells you to allow it to access the camera in order to take videos, but the phones don’t recognize it as an app so it doesn’t work. I don’t recommend this since it hasn’t been updated in three years, so nothing will change most likely.

Oz Girl Kim ,

Fun and useful

This was quick and easy to learn to use, and a lot of fun to play with. Kids love finding out their serve speeds, and so do the adults on my USTA teams.

I have no way to verify the accuracy of the mph calculations, but as long as the speeds provided are accurate relative to each other, they’re still a useful benchmark and good for comparison purposes.

App Privacy

The developer, TrackByte, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


TrackByte V.O.F.
15.6 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Spanish

Age Rating
In-App Purchases
  1. Compare yourself with ATP & WTA players $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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