In short my opinion on app notifications is that they need to be killed with fire. Then burned again just to be certain.
The only notifications I have enabled are the ones where timely information is important, e.g. gate changes for flights. Anything else gets shut off because it just NEVER is interesting and only succeeds in interrupting me. Call it the worst aspect of the attention economy.
If your app would ever interrupt me for anything that is not absolutely important, it would get uninstalled faster than I can swipe away the notification.
But well, I might not be your target audience (most probably am not actually)