iPad app for college.

I have all three of the ones you mentioned in your first post. I use whichever one seems to work best in the particular situation. PDF Expert is the best looking. Goodreader has great file organization. There's nothing that says you can't have more than one! 😉

FWIW and IMHO, I don't think and can't imagine an iPad being adequate for an Engineering student for several reasons.

1. It is difficult to share research/team projects with other students

2. No usb file sharing

3. No file structure

4. Inadequate document creation apps

5. Loss of some formatting in documents saved as Microsoft documents

6. Requires extra steps to ensure assignments are correctly formatted and readible by professors

7. Some engineering sites / programs may require java or flash, neither of which are supported by the iPad

8. I can't imagine typing large engineering papers containing complex graphics and tables on an iPad

9. The screen is far too small to read complex material easily

10. ...

But maybe the iPad will work for you. It did not for me.

Circus Ponies' Notebook app allows you to create diagrams, equations, etc. and embedd them in your notes. You can also attach and annotate PDF documents. You can use Dropbox to sync between the iPad and Mac, and you can export note pages to HTML for sharing on websites. It is a little pricey, but has more features than most note taking apps. There are versions for the iPad and the Mac.

As a follow up to my first note, you can also create documents with charts, diagrams, tables, etc. with Apple's Pages app. It syncs with iCloud so you can review your docs on the iPhone. It will also read and convert Microsoft Word documents. It might be a better choice than a basic note taking app.

The absolute best PDF program I've found is PDFpen, coupled with PDFpen pro on the Mac side. My entire medical ffice now uses it.