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the Galaxy S8’s Rounded Display Corners on Any Android
Step 1 Install Cornerfly
To get started, head to the Google Play Store and install Cornerfly, the app that will round off the corners of your screen.
Step 2 Grant Permissions (system overlay & accessibility service)
Open Cornerfly, then you’ll be asked to grant a pair of permissions for system overlay & accessibility service.
Make sure to enable the switch next to “System overlay” on this screen, then tap the “Accessibility service” entry. From here, select Cornerfly from the list, then enable the switch at the top of the screen, and press “OK” on the popup. When you’re done there, tap your back button twice to head back to the app, then press the check mark to finish initial setup.
Step 3 Enable Rounded Corners on the Navigation Bar
From Cornerfly’s main menu, make sure the switch in the top-right corner is enabled. From here, if your phone uses on-screen navigation buttons, you may want to tweak a few settings.
By default, Cornerfly will not round the corners of your navigation bar—instead, it will round the corners at the bottom of the foreground app (just above the navigation bar). This looks good with apps that use a black navigation bar, but if you have apps that color-match the navigation bar, the effect will look better if you have Cornerfly round off the navigation bar instead.
If you like to make things a bit prettier, head to the “Application” entry in Cornerfly’s main menu. From here, go through the list, then tick the box next to “Overlay Navigation bar” for any app that uses a color-matched navigation bar.