Change default calendar app in iOS 17

The setting you're talking about, Settings>Calendar>Default Calendar still exists under iOS 17. It just doesn't do what you think it does. It does not change the default calendar app. It changes the particular calendar (e.g. Work, Home, Holiday), that new appointments get added to. To the best of my knowledge, there has never been a way to change the default app.

You could try seeing what happens if you delete Apple's Calender app.

Remove iCal and when you click on date or time to add to calendar it asks you to go to apps store to re-install. Awesome.

It's probably not an option because you only have one calendar file or one calendar account. I don't know for sure. In the Calendar app, tap on the word "Calendars" in the bottom center of the screen. What do you see? How many calendars are listed? How many accounts?

But, even if it was there, as I explained above, it doesn't do what you want it to do. It will still not set a default calendar app.

I think, like with mail, this IS an option under calendar settings in the French version of iOS 17. The EU is somewhat anti-bundling. I’ll check my girlfriend’s phone but one option might be to set it up in another region where this flexibility is allowed by Apple. Note that if you set your default calendar to an EXCHANGE calendar it will enter events there and iCal will mirror them. That’s what I do and it works well!

devin91 wrote:

I think, like with mail, this IS an option under calendar settings in the French version of iOS 17. The EU is somewhat anti-bundling. I’ll check my girlfriend’s phone but one option might be to set it up in another region where this flexibility is allowed by Apple. Note that if you set your default calendar to an EXCHANGE calendar it will enter events there and iCal will mirror them. That’s what I do and it works well!

If you are setting the default calendar to "Exchange" you are choosing the default account you want appointments entered to. But it still has nothing to do with choosing a default calendar app (e.g. Proton, Fantastical, Week Cal).

devin91 wrote:

Yeah, I know. But I do most of my scheduling with Siri, so at least when I tell Siri to “blah blah blah” she puts it in my Microsoft Exchange calendar and not in iCal where I will lose it.

The OP's question was specifically on how to change the default calendar. When they asked last year...

Killasyougo wrote:

Remove iCal and when you click on date or time to add to calendar it asks you to go to apps store to re-install. Awesome.

1) There is no such app as iCal on an iPhone and 2) why would I want to do this?

Apple calendar app, whatever it is called. I was not telling you to do it I was responding to the other person who suggested deleting Apple calendar to see if it would default to another calendar app. As usual Apple will not allow it and there will be no calendar integration with anything but their app.

Killasyougo wrote:

I was not telling you to do it I was responding to the other person who suggested deleting Apple calendar to see if it would default to another calendar app.

You responded to me, hence my confusion.

Yeah, I know. But I do most of my scheduling with Siri, so at least when I tell Siri to “blah blah blah” she puts it in my Microsoft Exchange calendar and not in iCal where I will lose it.