Beam Rider — Privacy Policy

Last updated: October 27, 2026

Beam Rider is a camera theremin made by GROUCHO. This policy explains what Beam Rider does with your information. Short version: Beam Rider doesn't collect, store or send anything about you.

Camera

Beam Rider uses your phone's camera only to measure light and shadow so your hand can play notes. The camera picture is processed on your phone, in real time, and is never recorded, saved or sent anywhere.

Your pictures and songs

If you add your own pictures or audio, they stay on your phone and are only used inside Beam Rider while you play.

Settings

Beam Rider saves your settings (key, sound, calibration and similar) on your phone so they're there next time. They never leave your device. Deleting the app deletes them.

MIDI

If you connect Beam Rider to music software, it sends musical notes and control messages to the device you choose. It sends nothing else. 

YouTube

Beam Rider can play GROUCHO videos using YouTube's embedded player. When a video plays, YouTube (Google) may collect information under its own terms and the Google Privacy Policy: https://policies.google.com/privacy. Beam Rider doesn't receive any of it. It can be removed in the PRO version. 

Purchases

In-app purchases are handled entirely by Apple. Beam Rider never sees your payment details.

Analytics, ads and tracking

None. Beam Rider has no ads, no analytics and no tracking.

Children

Beam Rider doesn't knowingly collect any information from anyone, including children.

Changes

If this policy changes, the new version will be posted here with a new date.

Contact

Questions? Email grouchotheband@gmail.com or visit https://www.grouchoband.com or

or here at EPC