The only official way to obtain Nova Launcher Prime is by . This one-time purchase supports the developers of this phenomenal app and entitles you to lifetime updates and customer support. The cost is a small price to pay for the functionality and peace of mind it brings.
In the advanced settings, check the box for "Aggressive Desktop." This forces Android 4.4.4 to keep Nova Launcher loaded in the RAM, entirely eliminating home screen redraw delays when closing heavy apps. Conclusion nova launcher prime apk android 444