Nova Launcher is a powerful launcher application that will allow you to fully customize your smartphone's screen to give it the look you want for optimal usability.
Nova Launcher enables you to customize on-screen app icons by choosing from themes that you can purchase in the Google Play Store. It also includes night mode and dark theme. You can also place icons and widgets anywhere on your screen without having to fit the grid.
This launcher also allows you to back up your settings and import them into another phone or an Android tablet. You can save these backups in the end or upload them to the cloud.
Also, Nova Launcher increases your phone's response speed, improving the fluidity and optimizing its performance.
If you get the paid Prime version ($4.99), you will also be able to customize the command access gestures (swipe, pinch, double-tap...) to start, use and close your applications. You can also create app tabs or folders to better organise your apps, and even hide the ones you don't use without having to delete them from your phone.