IM+ originally released their app into the Marketplace with many complaints that the price was too high at $9.99. They then followed up by slashing the price to $4.99 and including Windows Live Messenger support. Well, SHAPE Services GmbH has upped their game yet again with their latest release of the IM+ client on Windows Phone.

IM+ has released an ad-supported version of their famous instant messaging client for free for Windows Phone and is now available in the Marketplace. Search for “IM Plus” in the Zune PC software or on your Windows Phone (scroll to the bottom of the search list for the free version) to download the new addition to the Marketplace.

(Update: I’ve also noticed that the original $4.99 app has been updated to a Pro version. I’ve yet to find any differences other than the ad support between the two)