After you’ve turned off the badges and notifications, the brightly colored icons on your phone may still be tempting you like a box of girl scout cookies. One way to make your phone less appealing is to set the screen to grayscale. You can do this under the accessibility options on iOS. You can even set it so that when you triple click the home button the phone switches between color and gray scale. For Android users the settings location varies, but it can usually be found under the accessibility menu.
If this still isn’t enough for you can always try the Light phone.