Proton Calendar on iOS being painfully slow

It is not often i ask questions here anymore. But I am generally interested are there people who use the Proton Calendar app on iOS?

I tried to set it up for some relative but while the Android app is already slow the iOS for proton calendar seems to be unusable. Maybe it is because they have quite a busy schedule but i hope that should no the reason. If you navigate back a couple years, the app seems to crash.

Ended up with setting it up as web app for now, which seems to be a lot faster, and actually does offer search, while the app does not…

Are there people actually using the iOS app? Am I doing something wrong?

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Hi

Are you talking about the app itself or the integration with iOS calendar? I do use it and haven’t found any issues so far, but admittedly I haven’t gone back in time only forward?

I do use it for everything, granted I don’t have 8 appointments a day or anything. I use it for sharing calendars and all my personal stuff, and while there are things that could be smoother (and rather basic features like search missing) I haven’t experienced it being slow.

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Recently moved away from Proton Calendar due to the lack of search functionality on the iOS app. Never found it to be slow and actually quite like the look of the UI. If they could just add search, some decent widgets and further improve speed + functionality, it would be the perfect Calendar app for me.

Tuta is incredibly frustrating with how long it takes to load events almost everytime the app opens. Adding events can also be quite buggy. It’s only the search function keeping it in use.

That is not a thing.

A very janky way to set up “integration” is to make a shared link from proton calendar and then creating a subscribed calendar in iOS to the proton calendar link.

No editing in the iOS calendar, but iOS calendar actually stores it offline and makes things searchable. Probably some questions around if it reduces security and/or privacy, but Proton calendar is still half baked on mobile imo. :man_shrugging:

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Yeah not quite usuable for a non techy user that way either.

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@Proton_Team Is anyone from Proton able to offer an update on when the new calendar apps, in particular the iOS app, are likely to be released? Not asking for a date but would be nice to know if it’s relatively soon or more likely towards the end of the year?

There recently has been a post by their Product Manager of Calendar on Reddit:

Hi everyone,

I’m the Product Manager working on Proton Calendar :waving_hand:

I wanted to jump in personally because I know Calendar is not where it needs to be today.

And I really do mean personally. I’m one of those slightly obsessive calendar people. My calendar is not just for meetings. It has errands, laundry days, reminders, tasks, focus blocks, etc.. because apparently I enjoy being managed by my past self.

So when Calendar is slow, buggy, missing search/offline/tasks, or generally makes it harder to plan your day, I feel that pain too.

The honest answer is that we are currently rebuilding Proton Calendar from the ground up across iOS, Android, and Web. This is our next-generation Calendar architecture, based on lessons from our previous Mail rewrite. The goal is to fix the foundational shortcomings rather than keep adding patches on top of an experience that needs a stronger base.

The main things we are working toward are:

  • Better performance and offline support, so that actions like creating or editing events can work even without connectivity.

  • Search, so you can find events quickly.

  • A more modern and responsive UI.

  • An improved Agenda / Schedule view.

  • A bunch of other improvements like opening event locations in your preferred maps app.

We are still shipping improvements to the current application where it makes sense. For example, we recently made it possible on Android to set Proton Calendar as your default calendar app on supported devices. We also launched appointment scheduling on Web because it did not require any mobile changes.

But for the biggest pain points the real fix is the next-generation Calendar.

Timelines are always tricky, especially with a rewrite of this scale, so I want to avoid over-promising exact dates. Our current plan is to make the next-generation Calendar available before the end of the year, starting with a beta / early access phase so we can gather feedback before replacing the current experience.

Thank you for bearing with us. I know it has been frustrating, and I really appreciate everyone who continues to give detailed feedback. The team is genuinely passionate about making Proton Calendar a much stronger product, and I’ll try to be more present here to answer questions where I can :grinning_face_with_smiling_eyes:

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Thanks for posting this :folded_hands:

Then it can’t be E2EE anymore, right?

I suspect so. Based on the below quote from the page it seems to imply it does, but I couldnt find anything beyond this even in their technical blog post they list in this doc:

Note: When sharing a calendar using Full view, you grant Proton Mail temporary access to the calendar. A URL is generated that contains the key required to decrypt the calendar. When the URL is used, Proton Mail(new window) has access to this key to decrypt the calendar. At no other time can we access the calendar.

Using something like iOS calendar probably checks in every few hours so thats the risk there. That being said until they make this app a bit more feature rich (namely search and offline mode) - I think its an acceptable risk for me. Web mode does work for search, but no offline mode. :frowning: