[yaeger]

Do they still do this? :

>Upon first launch, Sunrise invites you to create an account, then asks you to add a calendar. The first option, “iCloud Calendar”, brings you to a screen where the Sunrise app itself, in its native interface and code, solicits your Apple ID (iCloud) email address and password. […]

Cause that doesn't sound to appealing... I am already on edge about "logging in with facebook" on 3rd party sites even though that login widget comes directly from facebook and not the site itself. But to flat out make your own textboxes where you ask the user to enter their AppleID and password? That's just wrong.

[gshutler]

As danbee said, it's the only way to do it. You should be able to set up an app-specific password via Apple's site first and provide that instead.

[danbee]

I have a feeling this is the only way they can do it with iCloud. All other services take you to a service specific authorisation page.