Stringbed: Tension Meter

Stringbed is a string tension meter for tennis, squash and badminton rackets, built around one idea: calibrate once, right after stringing, and every later reading is on your own scale. Tap the strings, and Stringbed tracks how much tension they have lost and tells you when to restring. Every feature is free: no account, no trial, no subscription. CALIBRATE ONCE, TRUST EVERY READING - Phones and racket frames differ, so no app can read an exact tension from a tap alone. Stringbed asks for the one number you know for sure: the tension you strung at. - Measure within a few hours of stringing and enter it. From then on every reading of those strings is on your stringing scale. - Restrung? Your calibration carries over to the next strings. TENSION LOST, MEASURED EXACTLY - The tension lost needs only the change in pitch, no estimate: see the share of tension kept since stringing on every reading - Strung a while ago? Save a reading today and track the loss from it; calibrate at your next restring - Tension over time on a chart, these strings against the last ones HONEST READINGS - Three taps that agree make a reading; one odd tap never moves it - Before you calibrate, Stringbed shows the pitch and a rounded physics estimate, clearly labelled as one, never passed off as a measurement - It checks each tap and says why when it can't read one: the frame instead of the strings, a dampener still on, two taps at once, a knock instead of a ping - Works through mains hum, talk and a noisy club YOUR RACKET GARAGE - Every racket with its head size and string pattern (16x19, 18x20 and the rest) - Every stringing: strings, gauge, material, tension, date, stringer and price - Hybrids, and different main and cross tensions - Hours played, and how much tension is left after each session KNOW WHEN TO RESTRING - Restring reminders from how often you play (the usual rule: as many times a year as you play a week) - Flag a racket once it has lost the share of tension you choose ALSO - Tennis, squash and badminton, in pounds or kilograms, square inches or cm2 - A guide to measuring, calibrating and restringing, with its sources - Export your stringings and readings to CSV for a spreadsheet or your stringer - Dark and light themes; the screen stays on while you measure PRIVATE AND OFFLINE - The microphone is analysed on your phone: nothing is recorded, stored or sent - No account; back up every racket to one file and restore it on a new phone - Free with ads, never on the meter screen. An optional one-time purchase removes ads; no subscription, nothing locked. String tension meter, racquet tension app, tennis string tension tester, badminton string tension, squash string tension: Stringbed, from Fernhart Labs.