better late posting than never. From the team:
The Pass Command Line Interface, which had a beta release recently, is now officially launched.
We’ve often heard from our community that making Proton Pass data easily accessible in the terminal would significantly improve workflows, especially for development, scripting, and automation.
This update means that you can now securely retrieve secrets and other items across scripts, deployments, and continuous integration/continuous delivery (CI/CD) pipelines.
Enjoy!


https://proton.me/blog/pass-open-source-security-audit
https://proton.me/support/pass-offline-access
I’m not sure about iOS but offline mode works fine on Android by default and desktop once enabled.