If you were to try and find download any of the HERE apps on Windows Phone now, you will likely run into some issues.
For one, the apps do not show up on search, and secondly when you do find a direct link you will likely get this error:
Given the HERE’s recent history (the company has recently been purchased by a German car conglomerate) it is easy to think that the apps have made an exit stage left from the Windows phone platform.
This is however not the case, according to their support on twitter.
@WindowsUtd they will be back. There’s a temporary technical glitch at the moment ^J
— HERE (@here) September 20, 2015
When they do show up, the apps, which were updated less than 2 weeks ago, can be found in the Windows Store here.Source