Tension Tap: Racquet Strings

Tap your strings. See the tension. Hold your phone close to the string bed, tap the strings, and Tension Tap turns the ping into a tension in pounds and kilograms. It works with tennis, badminton and squash racquets. READS WHAT YOUR STRINGER SET Right after a restring, enter the tension you strung at and take one set of taps. From then on, readings are on your stringer's scale: a racquet strung at 55 lb reads 55 lb, and you can watch it fall from there. FIVE TAPS, AVERAGED Each reading is the average of five taps. You see how far apart they were, and a set that doesn't agree is flagged so you can take it again. A READING OR A REASON Every tap gets an answer. When the app can't measure, it says why: too quiet, too noisy, a vibration damper on the strings, or a pitch outside the range for that sport. KNOW WHEN TO RESTRING Each racquet keeps its own history. A chart shows the tension…