[increment_i]

Yep, using Android 6 now and I think the app has to ask for notification permissions on first app launch if I'm not mistaken.

[relics443]

Android does not have a permission system for notifications. A user can disable them for an app.

[increment_i]

Hmm. I could swear since upgrading recently that I've been asked whether an app can send me notifications. Could be wrong , I have a large mishmash of Android and iOS devices lying around the house.

[pawadu]

can this have been an in-app dialog?

many apps simply ask you if they can show you notifications.