Quantumult X
Cross Utility Ltd
Is Quantumult X optimized for iPhone Duo?
Duo support is confirmed.
What Duo support adds
Publisher reports iPhone Duo support.
App Store release notes for version 1.8.1 explicitly report iPhone Duo support.
Source
- Last checked
- 1 Nov 2026
- Source published
- 7 Oct 2026
- Version cited
- 1.8.1