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You're right, I was thinking of the web app, but then again most mobile web apps are lacking

Ah, you mean the mobile web version. I agree, that is an absolute dumpster fire that looks like it hasn't been updated since 2009.

Not sure why though, probably just lack of interest from Google.

most are lacking what exactly?

Usability. One of the worst examples is Google docs, which is almost impossible to use on mobile