TENNIS TENSION LAB

TENNIS TENSION LAB

Tension Lab: String Tension

Measure. Track. Restring.

Check your racquet in a few taps, follow tension loss over time, and know when a fresh string job could bring back the feel you trust.

Download on theApp StoreGet it onGoogle Play
10 secMeasure tension1,347Racquets216Strings
See your strings change. Play with confidence.Today’s string tension, clear at a glance.
1,347Racquets

8 SCREENS · ONE CLEAR WORKFLOW

See your strings change. Play with confidence.

Measure string tension, track every change, and plan your next restring.

See your strings change. Play with confidence.
01See your strings change. Play with confidence.
Five quick taps. Measured in 10 seconds.
02Five quick taps. Measured in 10 seconds.
Today’s string tension, clear at a glance.
03Today’s string tension, clear at a glance.
Time to restring? Never leave it to guesswork.
04Time to restring? Never leave it to guesswork.
Track every change in feel. See the full story over time.
05Track every change in feel. See the full story over time.
Every racquet and string setup, all in one place.
06Every racquet and string setup, all in one place.
1,347 racquets · 216 strings Find your setup in seconds.
071,347 racquets · 216 strings Find your setup in seconds.
Don’t choose by name alone. Compare how every string plays.
08Don’t choose by name alone. Compare how every string plays.

HOW IT WORKS

Measurement guide

01

Your strings change every time you play. Tennis Tension Lab helps you see that change before it surprises you on court.

02

Place your phone beside the racquet and tap the center of the string bed three to five times. The app analyzes the sound on your device and gives you a repeatable tension estimate in seconds.

03

KEEP YOUR SETUP CLEAR • Check current string tension • Compare each reading with the baseline from a fresh string job • Follow tension loss on a simple timeline • See when it may be time to restring • Keep every racquet, string job, hybrid setup and note together • Find models quickly in a catalog of 1,347 racquets and 216 strings • Compare string characteristics before choosing your next setup

DATABASE

1,347 · 216 · 1,300

1,347 racquets · 216 strings Find your setup in seconds.

1,347

Racquets

  • Babolat Boost Aero Pink - 2026
  • Babolat Boost Drive Wimbledon- 2026
  • Babolat EVO Aero - 2026
216

Strings

  • Babolat AddiXion +
  • Babolat RPM Blast
  • Babolat RPM Hurricane
1,300

Players

  • Novak Djokovic
  • Serena Williams
  • Steffi Graf

STRING TENSION KNOWLEDGE

Tension guide

For the most consistent results, measure the same racquet in a quiet place with the same tapping method. Readings are estimates based on sound and equipment information, not certified measurements from a stringing machine.

01

The Trap in Shopping for an 'Arm-Friendly Racquet'

A single model recommendation matters less than matching strings, weight, grip, technique, and training load together.

02

What Does 6 Points Head-Light Feel Like in Your Hand?

Balance shows where the total mass is concentrated, but it does not describe the entire effort of swinging the racquet.

03

Where to Start With Lead Tape or Tungsten Customization

Even adding just a few g can create a large change in swingweight and balance depending on placement.

04

Turn a Racquet Demo into an Experiment, Not a Shopping Trip

Demo racquets fitted with different worn strings can easily distort a frame comparison.

05

Signs That Your Grip Size May Not Fit

A finger-gap formula matters less than whether the racquet twists or makes you squeeze during a real swing.

06

98 vs. 100: Does a 2-Square-Inch Difference Really Matter?

The feel comes from more than two square inches; string-pattern density and frame design matter too.

Tension guide

READY FOR YOUR NEXT HIT?

Time to restring? Never leave it to guesswork.

Check your racquet in a few taps, follow tension loss over time, and know when a fresh string job could bring back the feel you trust.

Download on theApp StoreGet it onGoogle Play