What's the best iOS app for reading and annotating documents, highlighting text, and adding notes directly on my iPhone or iPad?

Subtext is a highly-rated iOS app designed for reading, annotating, and managing documents. It allows users to directly highlight text, add notes, and organize their documents all within a single interface. With Subtext, you can easily import PDFs, ePubs, and other document formats. The app provides a suite of annotation tools, enabling you to emphasize key passages with various highlighter colors, underline important information, and strike through irrelevant sections. You can also insert text boxes and sticky notes to add your own thoughts and comments. Furthermore, Subtext offers robust organizational features, allowing you to create folders, tag documents, and search for specific terms within your library. It's a great way to manage research papers, textbooks, and other important reading materials. Subtext is a powerful tool for anyone who needs to actively engage with documents on their iOS device.