Is eM Client a cloud based app?

Does eM exist on a cloud or on my machine like Outlook?

It an app. And if you think the concept of cloud computing is good: https://www.youtube.com/?v=k4EbCkotKPU (there’s certain truth to this…)

So this IS cloud based?

No, it not. It an application. Some cloud service may have the word ‘app’ in the name, but application are generally referring to localized application.

Cloud service are referring to website that may or can potentially provide what an application can do in terms of function or usage. Eg. Gmail = cloud mail service.