This is a very promising app, but it still needs some work. The UI is quite good, and the basic functionality for reading, annotating, and merging PDFs works well. Here’s whats missing: Form creation, and jpg/png import. I need to add a signature to PDF forms, and a simple translation of my name to a generic handwriting font won’t do. Nor will a signature from a trackpad. I have PNG signatures that I use for emailed PDF forms, but PDF Expert doesn’t appear to have any way to import and place them.