RacquetTune - String Tension app for iPhone and iPad

4.2 ( 2992 ratings )

Utilities Sports
Developer: Sten Kaiser

2.99 USD

Current version: 7.6, last update: 4 years ago
First release : 06 Apr 2010
App size: 7.53 Mb

Listen to your racquet and perfect your game!

RacquetTune ensures that your racquet is ideally suited to your style of play. Simple and straightforward to use, the app uses the sound generated by tapping the strings to calculate the tension with high accuracy. In addition, the interactive swingweight calculator aids in customizing your racquet to fit your own stroke pattern, while the stiffness calculator allows you to simulate different racquet configurations.

RacquetTune not only makes it easier to decide when it is time to restring, it is also an invaluable tool when testing different racquets and strings and in identifying which of your racquets is best suited for different types of games. RacquetTune also allows you to check whether your stringer is consistent in his work.
RacquetTune includes the following user-friendly tools:

Tension measurement
- Quickly determines the tension and stringbed stiffness.
- Able to detect changes in tension as small as 0.1 kg/0.2 lb.
- An accuracy indicator ensures results are consistent.
- Graphical presentation of sound waves helps you find the ideal way of tapping the strings.
- Settings can be customized to serve tennis, squash, racquetball and badminton racquets, respectively.
- View the tension history for each racquet as a list or a graph.
- Email a spreadsheet with test data.

Swingweight calculator
- Add as many weights as you wish to the frame.
- Move and change weights to visualize how swingweight, balance and sweet spot location are affected.
- Enter target values for the racquet and let RacquetTune distribute the weights automatically.

Stiffness calculator
- Simulate various racquet and string configurations
- Vary tension, string type and racquet head size.
- Shows load-displacement curves, stiffness and elastic energies
- Handles the large deformations encountered in actual play

View a demo video at racquettune.com

RacquetTune has been featured in tennis magazines in USA, Italy, France, Germany, Sweden and Norway.

"The app is very, very impressive. I get more tension diagnostic questions than just about anybody in the universe, so this is a very good thing to be able to recommend."
Jonathan Wolfe
US Racquet Stringers Association

Note, that the actual string tension in the racquet and the setting seen on a stringing machine are two different things and therefore incomparable - more information can be found at racquettune.com.

Pros and cons of RacquetTune - String Tension app for iPhone and iPad

RacquetTune - String Tension app good for

This app is very useful and seems to be accurate. Thx. If u can add a customer management tool inside that would be perfect.

Great and useful app for those who like to keep track of the racquets specs. String tension, frame stiffness, everything at hand. A must have for everyone who is a tennis gear addicted, and much easier to handle than other famous equivalent devices.

Very useful app to keep tracking your string tension. The extensive database about the subject is definitely a plus. You gotta read it before using the app.

I was always wondering about real time tension info on my strings since i wanted to know what tension was my racquet at just when I was getting the best feel from it. Now i can do it and let my stringer know exactly what I want and check his work too:)

Interesting app for measuring tension maintenance & stringer consistency. History data doesnt show in lbs even if set up in lbs. Would be nice to be able to add string info such as brand & model.

People who play a lot need consistency, and this app keeps the stringer in check, if you are not hitting well, you can now eliminate string tension issues, the actual accuracy of poundage doesnt matter (although very accurate actually) what one really needs and gets is a reference point and a way to monitor string tension drop over x hours of play , its great!

Some bad moments

This app says one of my racquet is 23 psi. It also says another racquet is 54 when I know it is 60 psi. All of the shock absorbers are off of the racquets. Mind you this is after plucking the string 99 times.

Strung Babolat PD 107 today at 54 reads 41.3 lbs. TiS2 strung yesterday at 55 today reads 49. Not happy.

Developer Sten Kaiser worked very diligently to solve my problem with version 4.0. Once again a fantastic app that I use on a near daly basis

I really want my $1.99 back. Ive been stringing tennis racquets since 1994. This App is a sham.

This app is based on measurement of the frequency of vibrating strings and requires that there be no dampers on the strings during measurements. Unfortunately, racquetball racquets nowadays tend to have integral or non-removable damping elements, so this type of app will not work.

Not a very great tool for badminton not very accurate... Also test on test all over the place wish havent purchase

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