I'd like to use even a basic version of SmartCite in Pages. Though Pages doesn't have all the features of Word, it's much faster and less buggy and I often use it for rough drafts.
YES! There should be much more support for SmartCite than just Word 2016 and Google Docs. Pages is just one example, but a great one. Other versions of Word is another, including creating a plugin that still works for Admin-managed Office accounts.
Part of this is pragmatic: why use software that's useless for such a key task? How is it reasonable to expect, given that the vast majority of researchers work in institutional settings with institution-purchased software for which they do not control Admin access, that the primary way a citation manager becomes useful to a workflow--putting citations into a document/creating a bibliography--is simply chalked up to "use MS Word online if our lack of seriousness doesn't work for you."
Which raises a deeper issue: I'm not putting original/sensitive research into MS's or Google's internally-scanned clouds. No one should--it's a major data privacy breach for human subjects research especially. By not prioritizing a wider, deeper set of offline app integrations, Readcube is actually baking-in bad data practice.
I preferentially use Pages. Please add SmartCite to be compatible with Pages.
We have added SmartCite for Citekeys which can be used with Pages. Please see here for additional information: https://support.papersapp.com/support/solutions/articles/30000041338-smartcite-for-citekeys-manuscripts-app