To PDF is absolutely free for those who want to convert Photos, Pictures, Contacts and Text Messages in Adobe PDF.
If you need more, we propose to buy separetely Converting, Annotating and Sharing features or the full version which includes all features.

The features of complete version of To PDF

Easy and fast converting to PDF
✓ Documents from iWorks and MS Office
✓ Web pages
✓ Emails and Email Attachments
✓ Photos and Pictures
✓ Clipboard content
✓ Text Messages
✓ Contacts
✓ Dropbox content

Annotate PDFs
✓ Add drawing
✓ Place text notes
✓ Highlight document text
✓ Add stamps

Organize PDFs
✓ Reorder/split/merge PDFs
✓ Save as Flattened copy

Share PDFs
✓ Via Dropbox
✓ Using iTunes File Sharing
✓ By EMail
✓ Show using VGA presentation