iOS and other mobile devices still struggle to process app URLs correctly. Very often, instead of opening the relevant app, instead a Web browser or app store launches, presenting completely useless, generic views.

Accordingly, it would be really helpful were the various Proton platform mobile apps, to check the scheme of URI's to see if the OS has a registered app, and open those directly, rather than attempt to launch the URI directly in a mobile or embedded browser.

This UX quirk happens basically every single time a mobile app URI appears in Proton Mail or other Proton apps.