# TennisTension Pro > Tennis racket string tension measurement app with a string library and history. (iPhone/iPad app by Ivaylo Velichkov.) - Source: https://appshunter.io/ios/app/tennistension-pro/id6741165303 (this page in markdown: same URL + `.md`) - Developer: [Ivaylo Velichkov](https://appshunter.io/developer/1688346812) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Rating: 2.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 18.0 · 6 MB - Languages: American English - Released: 2025-06-05 - Data updated: 2026-08-20 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/tennistension-pro/id6741165303/reviews.md ## What is TennisTension Pro? **Please note: TennisTension Pro is *not free*. We do offer a 3-day free trial for the both of the offered subscription plans.** To use all the features described below you must subscribe to TennisTension Pro, choosing from the following plans: – Monthly plan (1 month) – Annual plan (12 months) Check the momentous tension instantly of any tennis racket/string configuration! The measurement accuracy is 0.1kg(0.2lbs)! Enter the string and racket parameters - string model and diameter; racket head size, string pattern etc. Remove the string dampener! Tap gently the string couple of times to produce a ringing sound close to the phone microphone! Other features: • choosing a specific string model from a library with more than 130 different thoroughly examined string models • saving the different racket/string models configurations • saving measurements in a history section • Calibration. Read the instructions for the Calibration in the settings for more details. Subscription Terms and Details - Get unlimited access to all features for USD $1.99/month, USD $9.99/year - The payment will be charged to your iTunes account at confirmation of purchase. - The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. - Subscription may be managed and auto-renewal may be turned off by going to Account Settings after purchase. - The account will be charged for renewal within 24 hours prior to the end of the current period. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription to that publication. Privacy Policy : https://docs.google.com/document/d/1WrTpoB5qFgnWFdNszr4ydr5ipd_hIaGc Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Instant tension measurement - 0.1kg measurement accuracy - String and racket parameter input - Library of 130+ string models - Save racket/string configurations - Measurement history - Calibration feature ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly Plan | $1.99 | per month | | Annual Plan | $9.99 | per year | ## Frequently asked questions about TennisTension Pro ### How does TennisTension Pro measure string tension? TennisTension Pro measures string tension by analyzing the sound produced when you gently tap the strings near your phone's microphone. You need to input specific racket and string parameters for accurate readings. ### What are the subscription options for TennisTension Pro? TennisTension Pro offers a monthly plan for $1.99 and an annual plan for $9.99. Both plans include a 3-day free trial. ### Can I try TennisTension Pro before subscribing? Yes, TennisTension Pro offers a 3-day free trial for both its monthly and annual subscription plans, allowing you to test all features. ### How accurate is TennisTension Pro's measurement? The measurement accuracy of TennisTension Pro is 0.1kg (0.2lbs), providing precise readings for your racket string tension. ### Does TennisTension Pro have a library of string models? Yes, TennisTension Pro includes a library with over 130 different string models that have been thoroughly examined, aiding in accurate configuration. ### Can I save my racket and string configurations with TennisTension Pro? Absolutely. TennisTension Pro allows you to save different racket and string model configurations, as well as your measurement history for easy reference. ### How do I manage my TennisTension Pro subscription? Your subscription can be managed and auto-renewal turned off by going to your Account Settings after purchase. Auto-renewal must be turned off at least 24 hours before the end of the current period. ### What devices is TennisTension Pro compatible with? TennisTension Pro is available for iPhone and iPad, indicated by its support for these devices. ## Version history (last 2 releases) ### 2.0.1 — 2025-06-26 Improved app accuracy and added 80 new string models. ### 2.0.0 — 2025-06-05 No release notes. ## Apps similar to TennisTension Pro | App | Rating | Price | Category | | --- | --- | --- | --- | | [Tennis Fit](https://appshunter.io/ios/app/tennis-fit/id6504635618) | — | Free | Health & Fitness | | [AvosetGo](https://appshunter.io/ios/app/avosetgo/id1584546480) | — | Free | Health & Fitness | | [TRIFIT APP](https://appshunter.io/ios/app/trifit-app/id6446038058) | 4.9 (16) | Free | Health & Fitness | | [Overland Park Racquet Club](https://appshunter.io/ios/app/overland-park-racquet-club/id1333186678) | — | Free | Health & Fitness | | [Forest Lake Tennis Club](https://appshunter.io/ios/app/forest-lake-tennis-club/id6751648240) | — | Free | Health & Fitness | | [Mindfulness Athletics](https://appshunter.io/ios/app/mindfulness-athletics/id6739479646) | 5.0 (5) | Free | Health & Fitness | ## More apps by Ivaylo Velichkov - [TennisTension](https://appshunter.io/ios/app/tennistension/id1441997912) All apps by Ivaylo Velichkov: https://appshunter.io/developer/1688346812 ## Related topics [tension tennis](https://appshunter.io/ios/topics/tension-tennis) · [babolat](https://appshunter.io/ios/topics/babolat) · [racket tension](https://appshunter.io/ios/topics/racket-tension) --- *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 2026-08-20.*