Let's unleash the GPTs on this feature and make it happen!

Can we please get this soon? I can't believe it's been 11 years since this issue was created..

Same here; this feature would be really helpfull to fully leave Google native ecosystem on Android

Same thing as userabc. Really need this to integrate with friends/family (mostly on iCloud). Proton is my main calendar app, but without CalDav its usability takes a hit.

ICS is not an option because it means a public link (no very privacy aware), one way, and the refresh times are not good (according to your docs 4-16h).

I completely agree that native iOS Calendar support is needed.

I'm currently migrating my family from Google/Gmail to Proton, but the lack of proper integration with the native iOS Calendar app is one of the things holding us back from fully switching.

Being able to sync Proton Calendar via CalDAV and use it in the native iOS Calendar app feels like basic functionality, especially for users who want Proton to replace Google or iCloud services.

Together with native iOS Contacts sync, this would make a huge difference for us and would allow us to fully move away from Google.

I completely agree with userabc.

I was in the exact same position — genuinely motivated to leave Google behind, ready to move my whole family over. But the lack of CalDAV isn't a minor inconvenience, it's a dealbreaker: I need to see and edit all my calendars (personal and work) merged into one app, and without that I simply can't function day to day.

I get the encryption argument, but that's a trade-off I should be allowed to make myself. Put a big warning in front of it if you're worried about liability, but let the people who value integration over that specific protection choose. Right now Proton is deciding for us instead of letting us decide for ourselves.

Eleven years is a long time for a request to sit unanswered. At this point it's hard to stay hopeful this will ever ship — and until it does, this alone is enough to keep me on Google, which is exactly the outcome none of us wanted.

I had really hoped to switch away from Google. But the need to integrate with tools that merge my many personal/work calendars into one editable view in a single app is not something I can compromise on.

I was ready to become a family customer and move my entire family off of Google.

Until CalDav is supported, we will not be able to use your service.

I understand some don't like it because it's not fully encrypted. They don't have to use it. Make users agree to a warning if you want. But add the capability.

The benefits of not having my data on Google far outweighs any downside of having a less secure mechanism to access my calendar. But you choose not to allow customers to make that decision for themselves.

Given that this feature request has existed for 11 years, I doubt there is any hope of seeing it. And with that, I doubt there is any hope of my being able to subscribe to your service. What a shame.

I had really hoped to switch away from Google. But the need to integrate with tools that merge my many personal/work calendars into one editable view in a single app is not something I can compromise on.

I was ready to become a family customer and move my entire family off of Google.

Until CalDav is supported, we will not be able to use your service.

I understand some don't like it because it's not fully encrypted. They don't have to use it. Make users agree to a warning if you want. But add the capability.

The benefits of not having my data on Google far outweighs any downside of having a less secure mechanism to access my calendar. But you choose not to allow customers to make that decision for themselves.

Given that this feature request has existed for 11 years, I doubt there is any hope of seeing it. And with that, I doubt there is any hope of my being able to subscribe to your service. What a shame.

My family could really benefit from a Smart Wall Calendar (Skylight Calendar, DAKboard, Nori, Cozi, Hearth Display). While I could display my Proton Calendar using a shared calendar link, there is no way to modify events in Proton Calendar from the Smart Wall Calendar (bidirectional).

I suspect automated workflows with calendars will become more prevalent and it would be a differentiator if Proton can enable interoperability without compromising privacy (or at least allowing the user a choice).

My family could really benefit from a Smart Wall Calendar (Skylight Calendar, DAKboard, Nori, Cozi, Hearth Display). While I could display my Proton Calendar using a shared calendar link, there is no way to modify events in Proton Calendar from the Smart Wall Calendar (bidirectional).

I suspect automated workflows with calendars will become more prevalent and it would be a differentiator if Proton can enable interoperability without compromising privacy (or at least allowing the user a choice).

I really do need to have some functionality with CalDav/CardDav -- i've had to come up wiht a bunch of workaround and bandaids (running BaiKal locally for example)

While i fully understand the contention with. caldav and E2EE a application proxy that runs on a local machine (similar to Proton Mail Bridge -- except not storing the data as it does) should be a viable path - login / authenticate to the "proxy" which then can be a pure caldav endpoint with E2EE encryption between it and the proton calendars

Maybe?

I would love to use Proton Calendar as my daily driver, but
since the Android Widget for Proton Calendar is so big and clunky I rather use other calendar options.

Caldav and Cardav are old protocols.

They were not designed to be private. As such, you cannot have them and encryption at the same time.

The reason why Google, Microsoft etc offer support for these protocols is because they literally spy on you.

After six months of use, the lack of support for external calendar programs and apps is becoming increasingly frustrating. The same applies to email. While the encryption is excellent, the whole point of switching to Proton is to move away from American services like MS Office 365. If Proton’s solutions remain this cumbersome, we may have to reconsider whether to continue using them without these changes.

(editing as I think calendar sharing will work for me, contacts are still an issue)

I am on a "family" plan trial and this may break the deal. If iOS does not allow a different default calendar, that is a challenge (out of your control). I am testing if I can cobble features together to make this work. I think read only fee of external calendars would work, knowing that you would need to go to Google or Outlook to make changes in those (mainly work calendars) and they would then show up in Proton. I just need to not lose the overall view of my schedule (work and personal) which I have in Apple now.

For contacts, we also share contacts through a common Apple account. Contacts are needed for texting/messaging whether that is Apple texts, or Signal or ... I need a way to subscribe to a server for this and agree that it is not as secure as being all in Proton. But I need the functionality to get users to move platforms. Can you at least make "Text" an option in the Proton Contacts app like "Call" is now when you click on the phone number? Could it open Signal? ( I am sure I need to make this request in another thread..)

Contact and calendar are crucial, and I am looking to convert a domain of family users, meaning we all go or don't making it a challenge to figure out. I think I may have to cancel my 30 day trial and go back to prior setup without this. Very disappointed as I love the other work you have done.

C’est dans le cadre de ma lutte contre les monopoles des GAFAM que j’ai souscrit à la suite Proton. De même, je fais évoluer mes PCs de Windows vers Linux (Ubuntu). Il donc vraiment VITAL que Proton permette RAPIDEMENT à Calendar autorise WebCal.

Even the Google and Apple ecosystems support this standard. Proton shouldn't become another walled garden but allow users to use external calendar and address book applications if they want to.

I would like to see google (or other caldav based calendars) from proton mail. I got close by using the url ending in .ics but this one is static and does not sync (a simple download and import). Is there any way to use google calendar and sync. thanks.

Please add this sync, this is mandatory for custom integration within other company tools.

This is really needed in order to be a fully-featured, usable calendar app. There must be a technical way to make this work, even if it's hacky.