[iknowstuff]

I guess they have this for local email decryption: https://proton.me/mail/bridge

idk if they have anything like that for their other products like calendar or file storage

Presumably if you stick to mobile apps you won't be using JavaScript served by their server? Unless they're just html wrappers

[stavros]

Yeah, apps are generally OK, unless they're webviews, as you say.

The bridge looks good, though it seems really shady that it's not open source. I'd expect it to definitely be open.

[bsx]

https://github.com/ProtonMail/proton-bridge