Apple does so much right. iOS is not a perfect operating system but it is the best one out there. I can't speak for the Mac OS because, sadly, I don't own a non-iOS device (...yet).
When I purchased my iPad Air a few months ago, I started using iWork's Numbers and Pages and found these apps incredible for spreadsheets and word processing. By the way, I wrote this article outside on my porch on my iPad Air using Pages.