It caches your online data. It still has to connect online to a Proton account first and there are limitations in its functionality for nonpaid users beyond cloud synchronization.
You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !protonprivacy@lemmy.world
Empowering you to choose a better internet where privacy is the default. Protect yourself online with
Proton Mail, Proton VPN, Proton Calendar, Proton Drive. Proton Pass and SimpleLogin.
Proton Mail is the world’s largest secure email provider. Swiss, end-to-end encrypted, private, and free.
Proton VPN is the world’s only open-source, publicly audited, unlimited and free VPN. Swiss-based, no-ads, and no-logs.
Proton Calendar is the world’s first end-to-end encrypted calendar that allows you to keep your life private.
Proton Drive is a free end-to-end encrypted cloud storage that allows you to securely backup and share your files. It’s open source, publicly audited, and Swiss-based.
Proton Pass Proton Pass is a free and open-source password manager which brings a higher level of security with rigorous end-to-end encryption of all data (including usernames, URLs, notes, and more) and email alias support.
SimpleLogin lets you send and receive emails anonymously via easily-generated unique email aliases.
It does work offline AFAIK. What does it not do that you want it to do?
It caches your online data. It still has to connect online to a Proton account first and there are limitations in its functionality for nonpaid users beyond cloud synchronization.
What’s the difference between caching online data and “local first”?