Evernote shares the insider secrets of free apps

I wish my app was anything near that sticky. The vast majority of my users are filling an immediate need, so I get something like 75% of sales within 24 hours of trial signup, 85% within a week, and 95% within a month. (Despite being surprisingly regular, those are the actual numbers straight out of my Rails console.)<p>I suppose that is the "trial user as picked flower" model, as opposed to the "trial user as fine wine" model.

I'm not sure what the secret actually is. Are they saying that the secret to consumer freemium is to have a sticky app with good monetisation? Isn't that true of any kind of app?<p>Did anyone else figure it out?

&#62; <i>There was no built-in sharing function in the software that would have made it inherently viral. The app was simply useful and users shared it with their friends.</i><p>What kind of narrow definition of viral advertising is that? I mean if they shared it by email, it was because the product had viral capability.