Every application have icon application. The default icon application is Revo Apps Icon. You can change the icon application with your icon. Drop your icon into icon folder. The directory of the icon folder is images/icon/icon.png. Make sure your icon extension or icon type image is PNG. Don’t forget to change your name icon into “icon.png”. For icon push notification, you can change the file image in directory android/app/src/main/res/drawable/transparent.png. Same like icon application, the type image must PNG and change the file image name into “transparent.png”.