String Tension AI

Stop guessing. Start measuring. Your strings are losing tension right now - and you can't feel it. One tap reveals the truth. String Tension AI shows you the true tension

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

Download String Tension AI now and take control of your string tension today.

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