TennisFeel

The SweetSpot App

Tune the strings.
Trust the swing.

TennisFeel turns racket stringing into a measurable, repeatable process—so you can understand your setup, refine your feel and play with confidence.

Watch the story Explore the app
Built forplayers · coaches · stringers
TennisFeel logo: a tennis racket and ball connected to a pulse line
Stringbed signal
Session feedback
Power
Control
Spin

Less guesswork

More equipment knowledge

A setup that feels like yours

See the idea in motion

From a technical detail to a decisive feeling.

The racket is an extension of your arm. TennisFeel helps connect what happens in the stringbed with what you experience on court.

Product filmTurn up the sound

A smarter stringing loop

Make feel visible. Make progress repeatable.

01

Simulate before you string

Explore how a new protocol changes stringbed stiffness before committing to a restring.

02

Measure tension over time

Use a microphone-based frequency test to follow tension-related changes and know your setup.

03

Compare what you feel

Rate power, control and spin after each session, connected to the exact racket, string and protocol.

04

Refine your sweet spot

Turn repeatable experiments into a personalized stringing approach built around your game.

Your equipment, understood

A feedback loop between data and intuition.

Strings lose tension. Conditions change. Memory is imperfect. TennisFeel keeps the experiment connected—what you strung, what you measured and how it played.

  1. 01
    Set up

    Save your racket, string and stringing protocol.

  2. 02
    Test

    Simulate stiffness and track frequency over time.

  3. 03
    Feel

    Capture power, spin and control after you play.

  4. 04
    Refine

    Compare sessions and make the next change deliberate.

The story behind TennisFeel

Built where science meets the court.

TennisFeel began with a simple frustration: players can sense when a racket setup is wrong, but “feel” is hard to explain, compare or reproduce.

As a tennis player, licensed coach and scientist, the founder saw the same gap from three angles. The stringbed has a major effect on power, control, spin and comfort—yet most players still optimize it through costly trial and error.

So he built a working cross-platform prototype that brings simulation, microphone-based measurement and structured on-court feedback together. The goal is not to replace intuition. It is to give intuition a memory—and turn doubt into informed equipment choices.

Tennis coachCompetitive playerScientistProduct builder
TennisFeel connects playing experience with data-based transparency. It gives players a better understanding of their equipment and helps coaches give more informed guidance.
Franziska EtzelFormer professional player · Career-high WTA 376 · Tennis coach

Coming soon to iOS & Android

Know your racket.
Own your feel.

TennisFeel is moving from working prototype to polished beta. Store links will activate here as soon as the app is ready to publish.

Coming soon on theApp StoreComing soon onGoogle Play
No signup. No spam. Just watch this space.