A finalized version of the Skype app for Windows Phones has finally been released. A beta version of the app has been available since February, but this official release brings with it a few features that optimize the app for use on smartphones. Derek Snyder, Head of Mobile Marketing for Skype, writes on Skype’s The Big Blog:

Since releasing the initial beta app in February, we have received very positive and helpful feedback that has allowed us to improve the app. Additionally, we have added some new features including video calling in portrait mode and friend management capabilities including invite, accept invitations, block, and unblock contacts.

Skype is available as a free download from the Windows Phone Marketplace. Take a look at the video below to get a feel for how the app works. It’s exactly the same video and demonstration as the video for the beta version, just with a new intro and outro:

Both video and voice calls can be made over Wi-Fi, 3G, or 4G connections. This is essential, as other video calling apps also allow calls over data connections. One of those competitors, Tango, has been gaining support and already has a Windows Phone version of its app. Tango also has features Skype does not, such as video messaging and emote animations.

What do you think? Will you be using Skype on your Windows Phone or are they too late to the party? Is the market for Windows Phone apps large enough that Skype should even have bothered? Let me know in the comments below.