I use my iPad at all costs. I use Evernote to sync the report form and guidelines from my desktop to my tablet in their original form. I then fill in the form, whether is a true mystery shop, an audit or business verification. It works on or off line. I do print the signature and LOA pages. I fill out the form, then email myself a copy , or use the 'do you want a pdf" instead on some Sassy forms when I actually submit on line.
If the form is in a PDF form, I use Foxit PDF to be able to write on the form. Again then email my self a copy. If the guidelines are in PDF form, I open the PDF (on my tablet) while I'm at home and on WiFi, and take a screen shot of the page. That way I can see the guidelines when I'm in the field and without WiFi.
I use it for pictures as well. It takes great pictures. When I get home I upload the pictures from the tablet to Dropbox, and then extract them from Dropbox on the desk top.