Seems the iPhone’s become a superb diagnostic tool through sound analysis — not only can it evaluate watermelon ripeness, but now it can also be used to measure the tension of tennis or squash racquet strings with the racquetTune app.
The $1 app sports a slick, clean interface that displays a string’s tension after a few taps; there’s also a swingweight calculator thrown in for good measure.
The Swedish developers say racquetTune has been tested at the Royal Institute of Technology in Stockholm to good result — who knows, perhaps even by Bjorn Borg himself.
