E-mail client Sparrow has left beta and is now available for download via the Mac App Store.
Less than one week after its launch, Sparrow 1.0 has become the number one paid for app in the Mac App Store in the US, France, Germany and the UK.
Sparrow 1.0, which looks like Twitter's e-mail avatar, simplifies the e-mailing process on the Mac with its minimalistic design and powerful functionality.
The app is initially offering integration with Gmail only, but the company says that next month's update will bring IMAP support to the e-mail client. This, the company says, will allow users to integrate other e-mail clients with the app.
Sparrow 1.0 is now available from the Mac App Store for $9.99. The app aims to offer a much more simplified e-mail experience for Mac users than rivals Mail and Postbox.
According to TechCrunch, Sparrow has also managed to raise an unknown amount in a second round of funding from French venture capital firm Kima Ventures, which has also provided funding to start up Paper.li and Rapportive.
Sparrow has been created by developers Dominique Leca and Dihn Viêt Hoà.