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.
I restrung my racquet at 55#. This app said the tension was 40.2# right after I finished. I checked the string factor and ensured that I’d entered the correct values all the parameters (e.g. string pattern, racquet face size). I followed the measurement procedure to the letter. I could believe a couple lb. change but 15? Nyet. The racquet plays like 50-55. A Gamma String Tension Tester said the two center main strings were at 55# and the two center cross strings were at 39 and 40#. Why are other users getting numbers close to the tension at which they strung?Not even close for this app. Sorry
String factor accuracy is crucial
jdhdeudbdbd
Fantastic app. Incredibly useful to graph how the racket loses tension over time. Readings are very accurate. (note, if I’m stringing a poly, I can sometimes lose up to 10% by the time it’s off the stringer, then maybe another 10% over the next 48 hours) String factor accuracy is crucial, and the online database can be hit or miss, you’ll see lots of variation in there. You should measure this yourself to make sure it’s accurate, because it will greatly affect the reading. I use the weight method, and that’s worked out well for me so far.
Great to understand tension
joaocorreia
Great to understand how tension declines, not accurate but precise!.Keep notes on how it played and use the tension reported by the app as a reference. I use RPM Blast 17, pre-stretched 15 sec, strung at 55:53 and app reports 45.4, still very useful since these measurements are very consistent. I use this app now to keep a log of my string usage and tension. I recommend it!
Better than I expected
Moradali
I have had this App for a week now and the results have been much better than expected! I use it to find out how much tension drops after each playing session.
This update from Apple will improve the functionality of this app. No new features are included.
- Fixed the problem with detecting sound on iOS 26.4 and later.
- Fixed an issue with contributing strings to the online database.
Version 7.7
The developer, Sten Kaiser, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
