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If you read the article, that's the issue the author was talking about: it's basically impossible to make an app that can store its data locally, instead of on some web server. All apps that you download from App Store can live offline, where they're usable without Internet or trusting some faraway web server. You can't make a web app that can do that, and to some people it smells like Apple trying to force developer…
I don't really understand this. If you want to make something local, make an app and distribute through the app store, that's what it is for. A web app on the other hand is connected by definition, no? Apple forcing local apps to distribute through the app store is a feature .
No, it just has to run in a browser.