I've been wondering because i just bought a windows phone and realized it doesnt have the wallet app. any idea when windows phone will get the wallet app?
There is no "the" wallet app.
Various development teams have produced wallet software. Some are only for certain desktop or phone platforms, and some are multiplatform. You can find a list here. Some support Windows Phone.
As you have a Bitcoin Core related tag, there are no plans for creating a version for Windows Phone (nor for any other mobile platform).