This app was mentioned in 21 comments, with an average of 1.19 upvotes
Do you by any chance know what're the differences between OfficeSuite Pro (the link you provided) vs OfficeSuite Premium?
OfficeSuite Premium -> https://play.google.com/store/apps/details?id=com.mobisystems.office&hl=en&gl=US
> there are no good word processors in android (at least none that save in .doc97 format)
What's wrong with OfficeSuite+ and Polaris Office?
use office suite and they are all offline. its android app
https://play.google.com/store/apps/details?id=com.mobisystems.office
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OfficeSuit it really useful and I can check and create documents on the go. There is no need to come back to the office whenever I have to sign something. I am using it on all my devices and this makes me feel good, knowing I can do my job anytime, everywhere. Here is the link you can try it too, even the free version is cool: https://play.google.com/store/apps/details?id=com.mobisystems.office&hl=en
With my Sony Tablet came Office Suite which works quite good as a PDF reader and document browser. I get the feeling however, that it lags while loading PDFs with a lot of images (which RPG books tend to have). Other than that I find it pretty decent.
For phones, I guess. Currently I use OfficeSuite Pro which is very powerful. I plan on getting WP after some time, when I get a job. I want phones from all three OS - Android, iOS, WP.
The Android app OfficeSuite works offline and it's pretty great in my limited experience, though I'm not a heavy Word user so I don't know if there are any deal breaker incompatibilities. It has a free version with ads, though nothing that hampers it too much. It can export in the newer format (docx) in the free version but requires the Pro for the older one (doc). You could try this out first if you don't wanna bother with crouton and linux.
Officesuite can sign pdf files if that helps