Here's a reminder that Vine still exists: just six months after being acquired by Twitter and about two and a half months following its iOS debut, the Vine app is now the number one free software on the App Store. By comparison, Twitter's own iOS client sits at No. 35.
Vine's success is no small feat given that App Store charts are normally populated with a bevy of well-known games and entertainment titles which, by the way, command mobile app usage.
What's more, Vine is a really quirky piece of work: for Christ's sake, we're talking an app which lets you share ultra-short six-second clips here. Yet, a bunch of other video sharing programs can only dream of rising on top of App Store charts. So, what's the secret ingredient Vine has that similar programs lack?