This app uses your iPhone's microphone to measure the tension of your racquet strings. It tracks tension decay over time, offers personalized restring recommendations, and provides a comprehensive string toolkit for serious players.

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This app uses your iPhone's microphone to measure the tension of your racquet strings. It tracks tension decay over time, offers personalized restring recommendations, and provides a comprehensive string toolkit for serious players.






Instantly measure your racquet string tension using advanced audio analysis. Track tension loss over time, calculate swingweight, and optimize your racquet performance for tennis, badminton, squash, and racquetball.