Been using for awhile now.
Okay, so a few years back a dear friend showed my docs on my computer. We co-write (rp) together, and it gives a great place to do that since you can share with anyone else using docs. The grammar and spelling check is really nice, and the auto save feature is great! The reason the app gets four and not five stars is because the phone app itself has issues with larger docs(like 30 pages, I think) and won’t load well after that point. I understand why though, and am not actually bothered by it too much since I still have a computer, but I do have to notice which documents ARE that large, because it’ll sometimes it freezes up my phone(needing a restart). The phone app is also a bit more complicated to navigate than the computer version, but it is easy enough.
Betsu-nee about Google Docs, v1.2018.082