There should be a way to view notifications (new releases, updated playlists, new followers... etc) inside of the apps for iOS and Android.
The desktop and web apps have it, so why not the mobile apps too?
Currently you can get push notifications sent to your mobile devices, but you cannot view a list of those notifications inside of the app. Once you clear the push notification, you cannot see it again. They have only half implemented this feature by using push notifications. Well guess what? Not everyone wants to use push notifications. You should be able to easily see your notifications list inside of the Spotify app.
Twitter and Facebook have a way to view notifications inside of their mobile apps. It's so silly that Spotify does not.