300,000 existing apps received updates.
Microsoft said that its Windows Phone store received 75,000 apps during 2012, while 300,000 updates were applied to existing applications.
In a post on the Windows Phone developers' blog, the company said it had published enough apps to double the pre-existing slate during this calendar year.
Microsoft revealed that Windows Phone owners are, on average, downloading 54 apps to their smartphones, which was partly due to the improved lineup of apps and the new Windows Phone Store shopping experience. The search engine giant also said it published 300,000 updates to existing apps.
"Over the last year we've made a lot of discovery enhancements including Bing-powered search and smart lists, as well as new collections and recommendations for Windows Phone 8 customers," said Todd Brix, senior director of the Windows Phone app team.
Brix also stressed that 85 percent of Windows Phone users opted for applications that makes use of functioning Live Tiles, which delivers information to the Start Screen.

Steve Ballmer laughed at Google for having two OS's, he's got at least four!!!! And that is before you count the server builds.
Windows 8
WindowsRT
Windows Phone 8
XBox 360
MS really made a mess of Windows 8! It's a car crash......
I wanted MS to come out fighting so to force the others to start innovating again.
Gadgets were suppose to be a hit for Windows Vista/7 too weren't they?
It's a start...
Sure there are.
Skype
Linked in
AccuWeather.com
Kindle
Baconit
YouVersion Bible
Demote It
eBay
Flashlight-X
Handyscan
iHeartRadio
IMDB
The entire Nokia Suite is pretty good
Translator
Weave News Reader
And those are just the ones I have played with and enjoyed over the last 2 weeks I have had my phone, and I have not thrown any money at any of the for-pay apps yet (though I will soon).
Definitely a young ecosystem, but it is not full of junk either. Can't wait for free Pandora for a year either
Oh, and for developers:
Using live tiles is a MUST. If there is something even as simple as a number on the tile to let me know that something needs my attention is a big help. In fact, I tend not to use programs unless I see that it needs my attention.
Also, make the main background color of the app tile match the user theme.
It's like choosing sour seaweed-flavored Puffer fish when you could have something yummy instead. LOL. Happy New Year!
If you've got an Android phone, and don't intend to switch any time soon, then obviously you have no reason to get ANY other phone. Same with iProducts. If you've got a Mac, and an iPad, logic follows that you'd probably get an iPhone.
Just because you have no reason to change, doesn't mean nobody else will have a reason or desire.
Go and watch the 'Ubuntu for Android' videos. Gives you an idea of what I am on about. That would have been the killer app.
I'm a bit of a Google fan boy but I so wanted MS to bring out something that really rocked, with that kind of competition we the user will always win.