OK, here is an upside down image (no, me neither) of quite possibly the worst tablet I've ever owned. Despite being a Samsung, it is easily the slowest device I've ever tried to use and I only have it because it was a freebie with a contract upgrade five years ago.
This comes to every gig with me, so it's loaded with Gmail & Google Maps, iReal Pro & YouTube, even a way huge digital clock for use on NYE.
It came pre-loaded with something called Polaris Office 5, where the spreadsheet is compatible with Excel so that I can dump my original straight onto the tablet without issues.
At the gig I attach a phone holder to my mic stand, clip the tablet into it in landscape format, and enlarge the bit I need to see.