# QCALVIEW branding and attribution notice

Copyright © 2026 Fabrice Kerzerho — ArcTan°.

The QCALVIEW source code is distributed under the GNU GPL v3.0 or later. The software licence does not grant an unrestricted right to use the **QCALVIEW** or **ArcTan°** names, logos, or associated visual identity in a way that implies endorsement, authorship or official status for a modified or unrelated product.

Forks and modified distributions must comply with the GPL and applicable copyright notices. They should clearly identify modifications and must not misrepresent their origin.

A factual attribution such as the following is encouraged when redistributing or presenting derivative work:

> Based on QCALVIEW — originally developed by Fabrice Kerzerho / ArcTan° — qcalview.com

For branding, partnership or commercial enquiries: contact@arctan.fr
