# String Tension: Racquet Meter — Tennis Restring Tracker > Racquet string tension measurement and tracking app. (iPhone/iPad app by heekyung moon.) - Source: https://appshunter.io/ios/app/string-tension-racquet-meter/id6790018902 (this page in markdown: same URL + `.md`) - Developer: [heekyung moon](https://appshunter.io/developer/6779193748) - Category: Sports, Utilities - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 17+ - Requires: iOS 16.4 · 52 MB - Languages: American English - Released: 2026-07-20 - Data updated: 2026-09-08 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/string-tension-racquet-meter/id6790018902/reviews.md ## What is String Tension? ▶ Know exactly when to restring. Pluck a main string, hold your phone's mic close, and the app reads the vibration frequency to estimate the tension of your stringbed in kilograms or pounds. ▶ Set up a profile for each frame: head size, string type and gauge for tennis, squash or badminton. The physics of a vibrating string turns pitch into a tension figure you can compare over time. ▶ Watch the drop. Tension falls even when you are not playing, so a history graph shows how much softer your bed has gotten since the day it was fresh, like minus fifteen percent and counting. ▶ Set a threshold and get a reminder when your bed has dropped past the feel you like, so a restring is never a surprise mid match. ▶ Save several racquets, log each measurement, and share a clean result card. Works on device, no account needed. Readings are relative estimates that depend on your frame and string, and are best used to track change over time rather than as a certified gauge. Results vary with technique and setup. ## Key features - Estimate stringbed tension - Track tension over time - Create racquet profiles - Set tension drop reminders - Share measurement results ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/string-tension-racquet-meter/id6790018902/reviews.md ### 5/5 — Inconsistent *2026-08-24* I really wanted this app to work, but unfortunately it doesn’t! For one, the racket head size doesn’t have the correct size for a 100 sq in frame, one of the most common hoop sizes. Each time I got the app to register, it produced a different reading. I cannot rely on this app to give a consistent reading. 😢 Follow up: I changed the rating, not because of the app’s performance, but because of communication with the developers. Their response, and communications in private messages, tells me they are serious about creating an app that works. Keep in mind, it is a work in progress and they listen to constructive feedback. 👍 **Developer response:** Thanks for the detailed feedback — you're right on both counts. We're adding the common frame sizes (including 100 sq in) and switching to a multi-pluck average with an octave-sanity check, so a single stray reading can't skew the result and readings stay repeatable. In the meantime, if you tell us your racquet and string we're happy to help you get a reliable baseline. ## Frequently asked questions about String Tension ### How does String Tension estimate racquet string tension? String Tension analyzes the vibration frequency of a plucked main string using your phone's microphone. This frequency is then converted into an estimated stringbed tension in kilograms or pounds. ### Can String Tension track tension for different racquets? Yes, you can set up a profile for each racquet, including its head size, string type, and gauge, to accurately track tension changes for tennis, squash, or badminton frames. ### Does String Tension show how much string tension has dropped? Yes, the app provides a history graph that visualizes how much your stringbed tension has decreased over time since it was freshly strung, allowing you to see percentage drops. ### Will String Tension remind me when to restring? You can set a specific tension threshold. String Tension will send you a reminder when your stringbed tension drops below this preferred level, preventing surprises during matches. ### Does String Tension require an account to use? No, the app works directly on your device and does not require you to create an account to log measurements or save racquet data. ### Is String Tension accurate for precise tension readings? Readings are relative estimates that depend on your specific frame and string. They are best used for tracking changes over time rather than as a certified gauge, as results can vary with technique and setup. ### Does String Tension have ads? Yes, String Tension contains advertisements. This allows the app to be offered for free to users. ### What devices does String Tension support? String Tension is currently supported on iPhones. The app was last updated on August 22, 2026, with version 1.2.6. ## Version history (last 5 releases) ### 1.2.6 — 2026-08-22 Two improvements in this update: (1) Added a 100 sq in head size — 100 sq in racquets are now a one-tap pick, and tennis head sizes show in square inches. (2) A much steadier meter: it now averages several taps and only locks a number once your taps agree, so you get one stable reading instead of a value that jumps every time. Thanks to the players who wrote in. ### 1.2.3 — 2026-08-06 Alerts now arrive properly on Android instead of landing silently, and the app no longer interrupts you in the middle of what you came to do. ### 1.2.1 — 2026-08-03 Performance improvements, bug fixes, and refinements for the latest iOS. ### 1.1.1 — 2026-07-30 Performance improvements, bug fixes, and refinements for the latest iOS. ### 1.1 — 2026-07-28 Performance improvements, bug fixes, and refinements for the latest iOS. ## More apps by heekyung moon - [Blur & Mosaic Privacy](https://appshunter.io/ios/app/blur-and-mosaic-privacy/id6779193648) - [Aurora Northern Lights](https://appshunter.io/ios/app/aurora-northern-lights/id6779193746) - [Golden Hour Sun Tracker](https://appshunter.io/ios/app/golden-hour-sun-tracker/id6779194270) - [GIF Maker & Editor Studio](https://appshunter.io/ios/app/gif-maker-and-editor-studio/id6779194430) - [Slow Shutter Long Exposure](https://appshunter.io/ios/app/slow-shutter-long-exposure/id6780141566) - [Rain Alert Nowcast](https://appshunter.io/ios/app/rain-alert-nowcast/id6780142286) All apps by heekyung moon: https://appshunter.io/developer/6779193748 ## Related topics [string tension meter](https://appshunter.io/ios/topics/string-tension-meter) · [racquet tune](https://appshunter.io/ios/topics/racquet-tune) --- *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 2026-09-08.*