We store nothing else other than your IP address. Seriously.
Refer to PushNotifier's privacy.
The app stores your login information to CloudApp locally and encrypted. We do not receive any information about your credentials. We do however analyze the screens you're using while using the app. We do not see any information on that screen, except for the internal name of that screen (i.e.: your files' overview is called 'files-overview'). There is absolutely no personal information involved in any of our internal analysis.
The app does neither store nor do anything on its own. It doesn't even have a single line of code in it. It just contains the fonts for the CyanogenMod/LineageOS theme engine. Seriously.