PhotoMarks is a robust application designed for watermarking and annotating images in batch mode on iPhone. It allows users to easily protect their copyrighted images by adding customizable text and logo watermarks, enhancing both security and personalization. The app features a user-friendly interface with a scrollable film strip for managing multiple images, making it simple to edit photos in bulk. Users can also save their settings as profiles for quick access in future sessions.

The functionality of PhotoMarks includes no quality loss when watermarking, the ability to tie marks to specific zones for improved positioning, and support for both portrait and landscape modes. Users can manipulate text and logo marks with intuitive gestures, and the app offers a variety of customization options such as font selection, color palettes, transparency settings, and effects like shadows and strokes. Additionally, users can save their edited images directly to the Photos app or share them across popular social media platforms.