The icon is designed to be "instantly recognizable" to both old and new users, ensuring that whether a user is on an iPhone, iPad, or Mac, the "front door" to their documents feels familiar. 4. Customization and Adaptation
Often depicts a stylized piece of paper or a folder, signifying the app’s roots in file management and organization. PDF Expert by Readdle icon
The red color palette is a hallmark of the PDF Expert brand, distinguishing it from general document viewers and aligning it with the standard color associated with the PDF format. The icon is designed to be "instantly recognizable"