Here's how you can download the PDF Expert app free for your iPad, iPhone, iPad mini or iPod Touch.
1. Go to the PDF Expert app preview page in iTunes (or tap the link on your iOS device to install the app directly).
2. Click the View in iTunes button.
3. Click the Free button to download the app.
4. Sync your iPad, iPhone, iPod Touch or iPad mini with iTunes to install the app.
Here's a description and screenshot:
"PDF Expert allows you to read and annotate PDF documents, highlight text, make notes and save these changes being compatible with Preview and Adobe Acrobat. Moreover, PDF Expert is the only iPhone application that can fill PDF forms!
PDF Expert can get documents from any place you may need. PDF files from desktop computers, email attachments, documents on the Dropbox, MobileMe iDisk, GoogleDocs and even in other iPhone applications could be accessed with PDF Expert.
Annotations made with PDF Expert are saved within the document in accordance with PDF format specification. Thus PDF Expert can edit highlights, text notes and other annotations created in Apple Preview or Adobe Acrobat Reader and vise versa. At the same time this lets you share annotated files with friends and co-workers.
PDF forms made with Adobe Acrobat are supported in PDF Expert. Text fields, check boxes, radio buttons and other form elements work as you expect and all information you entered is saved inside the form. Please note that Dynamic XML PDF Forms made with Adobe LifeCycle should be converted to Static PDF Forms format before using with PDF Expert."