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RacquetTune - String Tension

RacquetTune - String Tension

Racquet optimization tools

462 ratings
168 reviews
#13 in paid Sports
πŸ”§ Utilities
⚽ Sports
$2.99

Details

  • Released
  • Updated
  • April 7, 2010
  • April 2, 2026

Developer

Sten Kaiser
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RacquetTune - String Tension video #1 for iPhone
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RacquetTune - String Tension screenshot #5 for iPhone
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About

This app uses sound to accurately measure racquet string tension and analyze racquet performance. It offers tools to customize racquets, simulate different configurations, and track stringing consistency for various racket sports.

βœ“String tension measurement
βœ“Swingweight calculator
βœ“Stiffness calculator
βœ“Racquet configuration simulation
βœ“Tension history tracking
βœ“Export test data
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What users say

Summarized from real user reviews of RacquetTune. Based on 462 reviews and a 4.6/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Sports app.

Positive things

  • πŸ”’Consistent and precise measurements
  • πŸ“ŠUseful for tracking tension loss over time
  • πŸ”§Helpful for customizing rackets
  • πŸ“‹Good for logging string usage and tension
  • πŸ”Accurate enough for most stringing needs

Negative things

  • πŸ›Inconsistent or inaccurate readings
  • πŸ”Not precise enough for some users
  • πŸ€”Complicated setup/calibration process
  • πŸ”‡Requires a quiet environment to work properly
  • πŸ”ŒStops working after some time
See all reviews

What's New in RacquetTune

7.7

April 2, 2026

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.

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πŸ“‰Β 13-3

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This app dropped -3 positions in Sports chart.

Last updated on July 21, 2026.

User reviews

Most RecentHighest RatedLowest Rated

great tool

been using it for years. great that it has note functions. I can know: when tension drops, How well I strung the racket and I can rate the setup for the future. Especially good for a nerd like me that tries a lot of different setups
AndyonehanderAndyonehander

No reading

I’ve followed the instructions in their YouTube video and can never get a reading for tension. Wasted money!
Bbartel78Bbartel78

Works well

Good for tracking tension drop
stan088stan088

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BLUEtree0107BLUEtree0107

Stopped working

Seems to have stopped working (does not detect sounds even though microphones access granted) on my iPhone 17 with iOS 26.4. Please update !
the Thoughtfulthe Thoughtful
See 163 more reviews

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User experience

🐞

Reported Bugs

4 issues

App crashes when trying to delete rackets

Bug

String factor database not working properly

Bug

Inconsistent readings on the same racket

Bug

Struggles with rackets with built-in dampers

Bug
✨

Requested Features

5 requests

Add more strings to the database

Feature

Allow logging of playing hours

Feature

Improve history/graphing features

Feature

Support for hybrid string setups

Feature

Add racket database for easier setup

Feature

FAQ

What does RacquetTune do?

RacquetTune is a mobile application designed to help you optimize your racquet for your playing style. It uses the sound generated by tapping your racquet strings to accurately calculate string tension and stringbed stiffness. It also includes tools for analyzing swingweight and racquet stiffness.

What are the key features of RacquetTune?

Key features include precise tension measurement with an accuracy indicator, a swingweight calculator to visualize the impact of added weights, and a stiffness calculator to simulate various racquet and string configurations. It also allows for tracking tension history and exporting test data.

How much does RacquetTune cost?

Based on the provided information, RacquetTune is a paid application. There are no mentions of free versions, subscriptions, or in-app purchases for core functionality.

What racquet sports is RacquetTune compatible with?

RacquetTune is designed to be used with racquets for tennis, squash, racquetball, and badminton. The app's settings can be customized to serve each of these sports specifically.

How can RacquetTune help me improve my game?

By accurately measuring string tension, RacquetTune helps you ensure your racquet is strung to your preferred specifications, impacting feel and performance. The swingweight and stiffness calculators allow you to fine-tune your racquet's characteristics to match your stroke pattern and playing style, potentially leading to better control and power.