I didn't knew about your website, and I was planning to improve my Italian soon. Seems I'll be starting right now, and it comes really handy to read the newspapers.
Alongside the "Install Web Reader" link there's a "Start Learning" link which will take you into the web-app and allow you to sign up. I figured "Start Learning" would be more inviting than "Sign Up" but this is something it might be worth AB testing.
I know, but almost every site has sign-in and sign-up link at the home page. I am a developer, but was confused how to sign up. I thought it was some kind of invitation model... I do not see any problem with putting a sign up link on the homepage. The more ways for your to sign up, the better.
Thanks! It worked fine to get some initial feedback and users. A few months later I added some limits to the free plan and offered a premium subscription, currently at $5 / month or $48 / year. Around 2% of free signups end up converting to paid.
Good stuff!