Here's how to easily install the new Galaxy S8 launcher on your Galaxy S7/S7 edge (Nougat)
The new S8 launcher is not wildly different from the one found on the S7, but it offers a handful of new features that you might find yourself quickly growing used to. One such feature is the a la Pixel pull-up drawer, which we like a lot better than the standard tap-button-to-open affair, if only for the ease of use (in fact, you can swipe up or down from anywhere on the home screen to open the drawer).
And the best part is that you can try out the new launcher right now on your Galaxy S7 running Nougat! There's no need to root your phone, or anything of the sort, and it only takes a minute if you follow the simple steps outlined below!
First thing you'll need to do is download the .apk file from one of the links below (courtesy of XDA user takerhbk) either directly on your S7, or on your PC and transfer it to your phone. If you get a “Can't open file” error when installing the app, just download the second file and it will work.
Now that you've downloaded the .apk file, all there's left to do is install it on your S7. To do so, you'll have to either tap the download notification, if you are doing this from your phone, or find the .apk file through “My Files”, if you transferred it onto your device from your PC.
Once you do this, you'll be prompted to enable installing apps from unknown sources. You can do so by tapping "Settings" in the pop-up box and switching on the "Unknown sources" toggle. A dialog box will appear that will let you choose whether to keep the option enabled or use it for this installation only.