RacquetTune - String Tension

RacquetTune - String Tension

By Sten Kaiser

  • Category: Sports
  • Release Date: 2010-04-07
  • Current Version: 6.3
  • Adult Rating: 4+
  • File Size: 4.18 MB
  • Developer: Sten Kaiser
  • Compatibility: Requires iOS 8.0 or later.
Score: 4
From 22 Ratings


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.



  • Not accurate

    By Stephen renwick
    Doesn't seem to be very accurate.
  • Brilliant Tennis App

    By Guy@Edinburgh
    Very simple and useful app to check the tension of your racket's strings. Worked without a problem - just remember to read the instructions first and hit the racquet with a round solid object (not a tennis ball). Love the function to record your tensions as now I can check the decay of different strings. --- Great app, keep up the good work 😀
  • Could be better

    By notorious jay
    Bit sensitive & complicated
  • A must have

    By ls206
    A must have for anyone who is interested in their tennis equipment.
  • Review

    By Jurassic125
    Excellent tool to measure tension loss and calculate swing weight. Really invaluable. Used after every hit it gives exceptional feedback on string performance.
  • Usable, but needs to be finished.

    By Mirzetann
    Reduced the score because the online database does not work currently and is giving string factor values of zero. Often it starts giving much too low readings- switch in and out of the app and it's fine- don't know why it does this. Sometimes the reading "creeps" up to the right figure- means you have to hit the strings lots of times- annoying. Also the default setting for expected tension is stupidly low- 55lb/25kg is too high for it even though this is the most common string tension. Why have a default that will be wrong for most people? The history can only use kg even though lb could show a lot more. Would be great if more strings were in the database. (And if it worked...) It would be also great if it could have a database of racquets and common configurations as well as strings.
  • Awesome Tennis-App.

    By MC¹³
    Racquettune is an amazing Tennis-app. For everyone who is stringing their own rackets. You are able to adjust a lot, but it's still simple and easy to use. You can save every tension-test and the diagrams will show you, if you have to re-string your rackets again! Result: Racquettune is worth every cent. Easy, simple, fast and very helpful!
  • Terrible

    By TheBull888
    No accuracy at all. Very frustrating.
  • Great App

    By Maclill
    I've been looking for a simple solution for years to be able to judge the relative tension of strings and this does job really well. Simple and allows me to be able to judge my work and offer other players better advice we they come back for a restring.
  • Useful app

    By Ali.06.06.06
    This is a very useful little app. Measures tension close to value measured with a stringmeter. Takes a little while to get used to the interface, but can then show graphs of tension vs time which seem accurate.