Does anyone know of any tool similar to this?
While I haven't found one, I find it hard to believe that they'd be the only ones implementing viral referral links in this way.
@anujadhiya The thing is, a few have come and gone. LaunchRock had a widget that did this, but shut it down. (Just official LaunchRock pages now.) KickoffLabs kind of does this now, but it's a bit overly complicated IMO.
GrowthHackers
Where can I find an iPhone 7?
The User Method