Legal notice
Information under § 5 DDG
QuadChroma – owner Robert Brandt (sole proprietor)
Schenkenberger Str. 3a
04509 Delitzsch
Germany
This legal notice also applies to the QC-Phone app for iPhone and iPad, a social project from QuadChroma (contact: social@quadchroma.tech).
Contact
E-mail: hello@quadchroma.tech
Phone (international): +1 650 447 1988 (Silicon Valley, USA)
Phone (Germany): +49 34202 899876 (Northern Saxony, Germany)
Contact form: quadchroma.tech/help/#contact
VAT
VAT identification number under § 27a of the German VAT Act (UStG): DE295445789
Responsible for the content under § 18(2) of the German Interstate Media Treaty (MStV)
Robert Brandt, address as above.
Consumer dispute resolution
We are neither willing nor obliged to take part in dispute resolution proceedings before a consumer arbitration board.
Sales
Our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders: Paddle.com Inc. for buyers in the United States, otherwise Paddle.com Market Limited. The details are in the terms and licence conditions.
This does not cover voluntary in-app purchases in the QC-Phone app (“Support QC-Phone”): Apple handles them through the App Store, not Paddle, and Apple’s terms apply.
Trademarks
Apple, App Store, iPad, iPadOS, iPhone, Mac, Mac mini, Mac Studio, MacBook, macOS and Retina are trademarks of Apple Inc. Windows is a trademark of Microsoft Corporation. Intel and AMD are trademarks of their respective owners. WireGuard is a registered trademark of Jason A. Donenfeld.
© 2026 NVIDIA, the NVIDIA logo, and NVIDIA Inception are trademarks and/or registered trademarks of NVIDIA Corporation in the U.S. and other countries.