Motion-reactive RGB cat ears

Light up
your ears~

espurr is a standalone pair of RGB cat ears. The lighting reacts to movement; the phone apps handle colours, effects and setup.

Runs on the headset. Phone optional.

01 / Hardware

LEDs, sensors
and cat ears.

An ESP32 or ESP32-S3 controller drives the LEDs and reads the motion sensors. The effects run on the headset itself.

Adjust how the lighting responds when you move, with calibration and motion settings for your hardware.

Choose an effect and save colour palettes on the headset. Use smooth gradients or distinct colour bands.

Buttons, effects and motion keep working without the app. No network or cloud connection needed.

02 / Software

The apps connect over Bluetooth. Use them to edit palettes, adjust effects, calibrate the sensors and install supported firmware updates.

There’s a local ear simulation for trying settings without connected hardware. Audition keeps those changes on your phone.

Live control needs compatible espurr hardware and firmware.

Apple

Full controls on iPhone and iPad. Quick controls on Apple Watch.

iOS / iPadOS 26+ · watchOS 26+

Android

A native Android app for effects, palettes, setup and the local preview.

Android 12+ · Bluetooth Low Energy

Store download links will go here once they’re available. The guides cover the current setup.

03 / Documentation & source

espurr is still in development. Check the hardware and firmware notes before building or flashing anything.