Notifyer must be enabled as an accessibility service and you must replace your regular app icons with 1x1 Notifyer widgets.
Check out Notifyer+ for lots more customisation options.
Recently reviewed here on www.wonderhowto.com http://galaxy-note2.wonderhowto.com/how-to/get-ios-style-badge-app-icons-your-samsung-galaxy-note-2-other-android-device-0148514/
Use the Contact the Developer link below if you have any questions or suggestions.
Attention Samsung Users.
A lot of Samsung phones have a small bug where enabling any accessibility service partially activates Samsung''s TalkBack service, causing the phone to speak out loud. When you open Notifyer for the first time you can follow the steps to fix the bug. Or use the Notifyer help menu at a later time.