# Tennis Radar: Ball Speed Gun — Tennis speed from serve video > Tennis ball speed tracker using video analysis and racket calibration. (iPhone/iPad app by Jonathan Mercandalli.) - Source: https://appshunter.io/ios/app/tennis-radar-ball-speed-gun/id6762805167 (this page in markdown: same URL + `.md`) - Developer: [Jonathan Mercandalli](https://appshunter.io/developer/1891612621) - Category: Sports, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.6 · 10 MB - Languages: American English, Arabic, Khmer, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 27 more - Released: 2026-04-23 - Data updated: 2026-08-30 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/tennis-radar-ball-speed-gun/id6762805167/reviews.md ## What is Tennis Radar? Discover how fast you really hit! Tennis Radar turns your smartphone into a highly precise speed-tracking tool. Forget expensive radar guns—all you need is a video of your serve, forehand, or backhand to instantly calculate your ball speed in km/h or mph. Built for tennis players, coaches, and enthusiasts, this app relies on hard math and physics, not guesswork or unpredictable AI. By using the standard length of a tennis racket as a physical scale, Tennis Radar analyzes the exact distance the ball travels between individual video frames to give you an incredibly accurate velocity reading. HOW IT WORKS (IN 4 EASY STEPS): 1. Import & Trim: Import a video from your gallery or record a new one. Use our precision trimming tool to isolate the exact moment of your swing. 2. Find the Impact: Use the frame-by-frame navigation controls to find the exact millisecond the ball leaves your racket. 3. Calibrate: Pinch and zoom into the video for pixel-perfect accuracy. Place a dot on the top of your racket, the bottom of your racket, and the ball. 4. Track & Calculate: Advance the video by 1 to 3 frames, tap the ball's new position, and instantly get your shot speed in km/h! POWERFUL FEATURES: • Precision Frame-by-Frame Player: Step forward and backward frame-by-frame to find the absolute perfect point of impact. • Advanced Trimming Tool: Easily isolate your swing. Use the "Zoom Range" feature to expand small sections of a long video for effortless micro-trimming. • Slow-Motion Support: Fully compatible with high-framerate and slow-motion videos. The app automatically detects slow-mo metadata, or you can manually set the speed multiplier (1x, 1/2x, 1/4x, 1/8x, 1/16x) to ensure the math is always flawless. • Pinch-to-Zoom & Pan: Zoom deep into the video while placing your tracking dots to ensure maximum accuracy without the dots getting in the way. • 100% Offline & Private: No AI, no cloud uploads, and no internet required. All video processing and speed math is done locally on your device. TIPS FOR THE BEST RESULTS: • Perpendicular Angle: For the most accurate physics calculation, film exactly from the side of the court, perpendicular to the ball's trajectory. • High Framerate: Record your videos in 60fps or 120fps. More frames mean less motion blur and highly accurate tracking! • Clear View: Ensure the entire tennis racket and the ball are clearly visible during the swing. Stop guessing your serve speed and start tracking your progress today. Download Tennis Radar and find out how fast your swing really is! Terms of use: https://mercandalli.com/ios/apps/terms-of-use/Tennis%20Radar More information: https://mercandalli.com/tennis ## Key features - Video analysis for ball speed - Offline processing - Frame-by-frame precision - Racket calibration - Slow-motion video support - Zoom and pan functionality ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Full version | $0.99 | per 7 days | ## Frequently asked questions about Tennis Radar ### How does Tennis Radar calculate ball speed? Tennis Radar analyzes videos of your shots by using the standard length of a tennis racket as a physical scale. It calculates the exact distance the ball travels between video frames to determine its velocity. ### Can I use Tennis Radar offline? Yes, Tennis Radar is 100% offline and private. All video processing and speed calculations are done locally on your device, with no internet connection or cloud uploads required. ### What is the accuracy of Tennis Radar? The app aims for high precision by using frame-by-frame navigation, pinch-to-zoom for pixel-perfect accuracy, and supporting high-framerate slow-motion videos. For best results, film from a perpendicular angle. ### Does Tennis Radar have ads? No, Tennis Radar does not contain advertisements. The app is free to download and use, with optional in-app purchases available. ### What devices does Tennis Radar support? Tennis Radar is available for iPhone and iPad devices, indicated by its support for these platforms. ### What is the age rating for Tennis Radar? Tennis Radar has an age rating of 4+, making it suitable for a wide range of users interested in tennis analysis. ### How often is Tennis Radar updated? The latest version of Tennis Radar is 1.00.13, and it was last updated on July 25, 2026. This indicates a recent update and ongoing development. ### What are the subscription options for Tennis Radar? Tennis Radar offers a 'Full version' subscription for $0.99 per 7 days. This likely unlocks additional features or removes limitations present in the free version. ## Version history (last 5 releases) ### 1.00.17 — 2026-08-21 - Better landscape support on iPhone - New information menu to present the app ### 1.00.16 — 2026-08-14 - Support landscape orientation on iPhone - Country flags to top players ### 1.00.14 — 2026-08-12 - New result chart to display PRO player speeds - Use the chart as the end of the measure to compare speeds ### 1.00.13 — 2026-07-25 Stability improvement ### 1.00.12 — 2026-07-22 New onboarding presentation of the app ## More apps by Jonathan Mercandalli - [Duoptra - Dual Camera](https://appshunter.io/ios/app/duoptra-dual-camera/id6761823299) - [Golf Radar - Swing Speed Gun](https://appshunter.io/ios/app/golf-radar-swing-speed-gun/id6793128460) All apps by Jonathan Mercandalli: https://appshunter.io/developer/1891612621 ## Related topics [radar gun tennis](https://appshunter.io/ios/topics/radar-gun-tennis) · [speed gun for tennis](https://appshunter.io/ios/topics/speed-gun-for-tennis) · [tennis serve speed tracker](https://appshunter.io/ios/topics/tennis-serve-speed-tracker) · [tennis serve speed](https://appshunter.io/ios/topics/tennis-serve-speed) --- *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 2026-08-30.*