# RacquetTuner — Measure Strings & Swingweight

> Audio analysis app to measure racquet string tension and calculate swingweight. (iPhone/iPad app by Jalsaa.)

- Source: https://appshunter.io/ios/app/racquettuner/id6755720177 (this page in markdown: same URL + `.md`)
- Developer: [Jalsaa](https://appshunter.io/developer/1451276283)
- Category: Sports, Utilities
- Price: Free with in-app purchases
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: +4
- Requires: iOS 16.0 · 3 MB
- Languages: American English
- Released: 2025-11-27
- Data updated: 2026-08-17
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/racquettuner/id6755720177/reviews.md

## What is RacquetTuner?

RacquetTuner uses advanced audio analysis to measure your racquet string tension instantly. Simply tap your strings and get accurate readings in seconds.

Perfect for tennis, badminton, squash, and racquetball players who want to maintain peak racquet performance and know exactly when to restring.

ACCURATE STRING TENSION MEASUREMENT

RacquetTuner analyzes the sound frequency produced when you tap your strings to calculate tension with precision. The app detects changes as small as 0.1 kg (0.2 lb), giving you reliable data you can trust.

The measurement is based on proven physics: string vibration frequency is directly related to tension. Higher tension produces higher frequency sounds, and our algorithm converts this into accurate tension values.

HOW IT WORKS

1. Select your racquet and sport type
2. Tap the center of your string bed
3. View instant tension reading with accuracy indicator
4. Save measurements to track tension loss over time

FEATURES

String Tension Measurement
- Instant readings from audio analysis
- Accuracy indicator shows measurement quality
- Real-time waveform visualization
- Support for metric (kg) and imperial (lb) units

Swingweight Calculator
- Calculate swingweight from racquet parameters
- Simulate adding lead tape at different positions
- Optimize balance point for your playing style
- Visual racquet diagram with weight markers

Stiffness Calculator (Premium)
- Model stringbed stiffness from tension and head size
- Compare power vs control characteristics
- Load-displacement curve visualization
- Simulate different string types

Racquet Profiles
- Store multiple racquet configurations
- Track tension history for each racquet
- Record string type and stringing date
- Export measurement data to CSV

SUPPORTED SPORTS

Tennis - Standard tension range 18-32 kg
Badminton - Standard tension range 9-14 kg
Squash - Standard tension range 11-16 kg
Racquetball - Standard tension range 14-22 kg

WHY MEASURE STRING TENSION

String tension drops immediately after stringing and continues to decrease with play. After two months, strings typically lose half their initial tension. This affects:

- Shot control and accuracy
- Power and ball speed
- Spin generation
- Comfort and arm health

Regular tension monitoring helps you maintain consistent performance and decide the optimal time to restring.

PREMIUM SUBSCRIPTION

Unlock all features with Premium:
- Unlimited racquet profiles
- All sport types (Badminton, Squash, Racquetball)
- Tension history graphs
- Stiffness calculator
- CSV data export

Subscribe weekly, monthly, or yearly. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage subscriptions in Account Settings.

ACCURACY NOTE

RacquetTuner provides reliable relative measurements for tracking tension changes over time. For best results, tap consistently in the center of the string bed and ensure no dampeners are attached during measurement.

SUPPORT

Questions or feedback? Contact us at hi@jalsaa.com

Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Instant string tension measurement via audio analysis
- Swingweight calculation and balance point optimization
- Stiffness calculator for power vs. control analysis
- Racquet profile storage and tension history tracking
- Support for tennis, badminton, squash, and racquetball
- Metric and imperial unit support

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Yearly | $49.99 | per year |
| Premium Monthly | $5.99 | per month |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/racquettuner/id6755720177/reviews.md

### 1/5 — Microphone Sensitivity too low

*2026-02-16*

Microphone won’t register anything unless you “pay for premium”. Useless

## Frequently asked questions about RacquetTuner

### How does RacquetTuner measure string tension?

RacquetTuner uses advanced audio analysis. By tapping your racquet strings, the app analyzes the sound frequency produced to calculate the tension with precision, detecting changes as small as 0.1 kg.

### What sports does RacquetTuner support?

RacquetTuner supports tennis, badminton, squash, and racquetball. Each sport has a standard tension range that the app can measure and analyze.

### Can RacquetTuner help me improve my game?

Yes, by accurately measuring string tension and tracking its loss over time, RacquetTuner helps you maintain consistent shot control, power, and comfort, allowing you to decide the optimal time to restring.

### What is the Premium subscription for RacquetTuner?

The Premium subscription unlocks unlimited racquet profiles, all sport types, tension history graphs, the stiffness calculator, and CSV data export. It is available via weekly, monthly, or yearly plans.

### How accurate are RacquetTuner's measurements?

RacquetTuner provides reliable relative measurements for tracking tension changes. For best results, tap consistently in the center of the string bed and ensure no dampeners are attached during measurement.

### Does RacquetTuner have ads?

No, RacquetTuner does not contain advertisements. The app is free to download and use, with optional premium features available through a subscription.

### What devices is RacquetTuner available on?

RacquetTuner is available for iPhone and iPad devices. It is designed for users who want to monitor their racquet performance on the go.

### How do I cancel my RacquetTuner Premium subscription?

Subscriptions can be managed and canceled in your device's Account Settings. To avoid renewal charges, cancel at least 24 hours before the end of the current subscription period.

## Version history (last 1 release)

### 1.0.2 — 2025-11-27

No release notes.

## Apps similar to RacquetTuner

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| --- | --- | --- | --- |
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| [StringTension](https://appshunter.io/ios/app/stringtension/id6761807131) | — | Free | Sports |

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## Related topics

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*