A: No – Nova uses Device Admin permission on Marshmallow. Root is not necessary.
A: You likely downloaded an APK built for Android 8.0+. Download Nova Launcher v7.0.58 specifically. Also, ensure you have ~50MB free internal storage. nova launcher prime apk android 601 better
Android 6.0.1 was released in December 2015. While it introduced Doze mode and granular app permissions, its default launcher (whether Google Now Launcher or TouchWiz) is primitive by today's standards. Here’s what Nova Launcher Prime brings to the table: A: No – Nova uses Device Admin permission on Marshmallow