Updating
-26
#84 in Top Grossing Apps > Sports
Description
Know exactly when your strings need replacing — before you feel it on court.
String Tension AI turns your iPhone's microphone into a precision string tension meter. Tap your stringbed, and the app instantly analyzes the sound to calculate your current tension. Track how your strings lose tension over time and get personalized recommendations for your next restring.
HOW IT WORKS
1. Tap your racquet strings near the microphone
2. The app analyzes the sound and calculates tension
3. Track changes over time and know when to restring
No external devices needed — just your iPhone.
MEASURE WITH CONFIDENCE
• Real-time quality coaching guides you to better readings
• Calibrate with a known reference tension for maximum accuracy
• Quality scoring ensures reliable, consistent measurements
TRACK TENSION OVER TIME
• Visual tension decay charts show exactly how strings lose tension
• Smart restring recommendations based on your actual data
• Set personal tension targets with alerts when strings fall outside range
• Compare performance across different racquets side by side
PERSONALIZED RECOMMENDATIONS
• Tension Advisor suggests your optimal stringing tension
• "What If" scenarios for different conditions and playing styles
• String recommendations matched to your playstyle profile
• Hybrid string builder finds your perfect main/cross combination
YOUR COMPLETE STRING TOOLKIT
• Database of 200+ tennis strings with detailed characteristics
• Pro player string and racquet setups from the ATP, WTA, and Legends tours
• Cost tracking and annual budget management for restringing
• Restring history and analysis across all your racquets
• String wishlist to plan what to try next
PLAYING SESSION TRACKER
• Log playing time with intensity tracking
• Weekly streaks, goals, and 38 unlockable milestones
• See how playing volume affects your string tension
BUILT FOR SERIOUS PLAYERS
• Unlimited free measurements — no paywall on core features
• iCloud sync keeps your data across all your devices
• Export detailed PDF and CSV reports
• Send string job reports directly to your stringer
FREE VS PRO
Free: Unlimited measurements, 1 racquet, quality coaching, calibration, session tracking, goals, fun facts, pro player databases
PRO: Unlimited racquets, full analytics and decay charts, tension advisor, string recommendations, hybrid builder, cost analytics, detailed playing stats, milestones, iCloud sync, PDF/CSV export
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Download String Tension AI now and take control of your string tension today.
Terms of Use: https://stringtensionai.com/terms/
Privacy Policy: https://stringtensionai.com/privacy/
What's New in Version 2.13
Version 2.13 improves playing-session stats and weekly recap reliability, strengthens measurement deletion cleanup, hardens synced data imports, caps playing-session notes consistently, and continues internal code organization work.
Plus, performance improvements and bug fixes.
Seller
Name
Trader Prosperity LLC
Information
Developer
Version
2.13
Size
24 MB
Game Center
No
VPP Device Licensing
Yes
Rating
Rated: 4+
Compatibility
iOS 17.0 or later
Devices
iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE (2nd generation), iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 12 mini, iPhone 13, iPhone 13 Pro, iPhone 13 Pro Max, iPhone 13 mini, iPhone SE (3rd generation), iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 16e, iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, iPhone 17e, iPad (5th Generation) Wi-Fi, iPad (5th Generation) Wi-Fi + Cellular, iPad (6th generation) Wi-Fi, iPad (6th generation) Wi-Fi + Cellular, iPad Pro, iPad Pro (Cellular), iPad Pro (9.7-inch), iPad Pro (9.7-inch) (Cellular), iPad Pro 12.9-inch (2nd generation), iPad Pro 12.9-inch (2nd generation) Wi-Fi + Cellular, iPad Pro (10.5-inch), iPad Pro (10.5-inch) Wi-Fi + Cellular, iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro 12.9-inch (3rd generation), iPad Pro 12.9-inch (3rd generation) Wi-Fi + Cellular, iPad Air, iPad Air (Cellular), iPad Air 2, iPad Air 2 (Cellular), iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPad mini Retina, iPad mini Retina (Cellular), iPad mini 3, iPad mini 3 (Cellular), iPad mini 4, iPad mini 4 (Cellular), iPad mini (5th Generation), iPad mini (5th Generation) Wi-Fi + Cellular, iPad (7th generation) Wi-Fi + Cellular, iPad Pro 11-inch (2nd generation), iPad Pro 11-inch (2nd generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (4th generation), iPad Pro 12.9-inch (4th generation) Wi-Fi + Cellular, iPad Air (4th Generation) (Wi-Fi), iPad Air (4th Generation) (Wi-Fi + Cellular), iPad (8th generation) Wi-Fi, iPad (8th generation) Wi-Fi + Cellular, iPad Pro 11-inch (3rd generation), iPad Pro 11-inch (3rd generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (5th Generation), iPad Pro 12.9-inch (5th Generation) Wi-Fi + Cellular, iPad (9th Generation), iPad (9th Generation) Wi-Fi + Cellular, iPad mini (6th Generation), iPad mini (6th Generation) Wi-Fi + Cellular, iPad Air (5th generation), iPad Air (5th generation) Wi-Fi + Cellular, iPad Pro 11-inch (4th generation), iPad Pro 11-inch (4th generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (6th generation), iPad Pro 12.9-inch (6th generation) Wi-Fi + Cellular, iPad (10th generation), iPad (10th generation) Wi-Fi + Cellular, iPad Air 11-inch (M2) Wi-Fi, iPad Air 13-inch (M2) Wi-Fi, iPad Air 13-inch (M2) Wi-Fi + Cellular, iPad Pro 11-inch (M4) Wi-Fi, iPad Pro 11-inch (M4) Wi-Fi + Cellular, iPad Pro 13-inch (M4) Wi-Fi, iPad Pro 13-inch (M4) Wi-Fi + Cellular, iPad mini (A17 Pro) Wi-Fi, iPad mini (A17 Pro) Wi-Fi + Cellular, iPad (A16) Wi-Fi, iPad (A16) Wi-Fi + Cellular, iPad Air 11-inch (M3) Wi-Fi, iPad Air 11-inch (M3) Wi-Fi + Cellular, iPad Air 13-inch (M3) Wi-Fi, iPad Air 13-inch (M3) Wi-Fi + Cellular, iPad Pro 11-inch (M5) Wi-Fi, iPad Pro 11-inch (M5) Wi-Fi + Cellular, iPad Pro 13-inch (M5) Wi-Fi, iPad Pro 13-inch (M5) Wi-Fi + Cellular, iPad Air 11-inch (M4) Wi-Fi, iPad Air 11-inch (M4) Wi-Fi + Cellular, iPad Air 13-inch (M4) Wi-Fi, iPad Air 13-inch (M4) Wi-Fi + Cellular, iPod touch (6th Generation), iPod touch (7th generation)
Languages
English
App Store: Customer Ratings
Ratings & Reviews
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App Store: Customer Reviews
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