With laptop , printed logs must accompany for inspection.
With Qualcomm, all that's required is a looksie at the screen.
I think the rules should be the same for both devices. PRINTED LOGS.
As for any paperwork. I use my own personal standard email system. Montana didn't like the word FAX, that was printed on something that was faxed to my laptop.
As for email and fax. I'm pretty sure highway patrol doesn't have fax capabilities. And a internet signal is also required. Which isn't available everywhere one goes in america. My laptop program has the ability to fax and email. But i'm ALWAYS asked for my book. ( printed papers ) You are also giving them their own personal copy of your logs by using email.