If you use Sparrow as your email app of choice on the iPhone, I am sure you know by now that there is no way to set the app as the default mail client within iOS. This can be very frustrating when you click on an email in the Web, and then it opens Mail.app— especially when you really wanted Sparrow instead. Here’s how to set Sparrow as your default mail client while using a jailbroken iPhone. Jeff does this by using a jailbreak tweak called Sparrow+, which should be available on Cydia’s BigBoss repo soon.
Furthermore, Sparrow+ also enables push notifications, which is something that Sparrow lacks but claimed is coming soon. If you are a diehard Sparrow user (like me), I think this tweak is a no brainer… if you are jailbroken of course.
You can purchase Sparrow on the App Store for $2.99.