Warbler is a pixel art editor designed for iPhone users, providing a comprehensive set of tools for creating detailed dot art. The application allows users to select canvas sizes ranging from 16x16 to 256x256 pixels, making it suitable for various artistic projects. Key features include a layer function, cursor mode, and the ability to create dot art from images, along with importing existing works. Users can also register patterns for easy filling and utilize video output capabilities, enhancing the creative process.

The app supports Apple Pencil, providing a seamless drawing experience. Users can export their creations in multiple formats, including PNG, SVG, and video formats such as MOV, APNG, and animated GIFs. While the app is free, unpaid users face limitations on the number of new creations, which can be increased by watching video ads. Additionally, a banner ad is displayed on the top screen, with options for removal available through in-app purchases.