You can easily change the look of icons on your Essential Phone running Android 8.0 Oreo or higher without downloading a new launcher or icon packs.
- Turn on Developer Mode (tap Build number 7 times in a row)
- Open Home Settings
- Tap Change icon shape
- Choose a shape
Developer Mode isn't turned on when you set up the phone. To turn it on, tap Settings > System > About phone, then scroll to the bottom of the screen and tap Build number seven times in a row.
In Android 8.0 Oreo and above, you may need to Restart your Essential Phone before you see the option in Home Settings to change your icon shape. In Android 9 Pie, you don't have to restart your phone, but you may need to quit the Settings app before the option appears in your Home Settings.
And to change icons back to their original shape, select Use system default. If an app icon doesn't change—or has a new frame around it—the developer of that app hasn't provided different shape options.