Terms of Use
Last updated: September 10, 2026
1. Free License Grant
Duo is 100% free software. You are granted a non-exclusive, perpetual license to download, install, and run Duo on any personal or commercial Mac computer without payment or subscription fees.
2. Updates & Compatibility
Duo is provided free of charge, including all future updates within the product lifecycle. Duo requires macOS 14 Sonoma or later and Apple silicon hardware with an integrated lid angle sensor for full clamshell tracking, with full simulation support on all desktop Macs.
3. Free Distribution
Duo is distributed freely as a direct macOS disk image (.dmg). You are welcome to share the application and spread the word to friends and colleagues.
4. Disclaimer & Limitations
Duo is provided "as is" without warranty of any kind. In no event shall the authors be liable for any damages arising out of the use or inability to use this software.