Microsoft has released an update to what was known as the Phone Insider app for Windows Phone. The now Windows Insider for Windows Phone app is essentially the same app with a new name but clearly prepares the way for Windows 10 to come to your phone in February.
The update really doesn’t chance much in the way of functionality yet. Microsoft has been clear that Windows 10 for phone will be coming in February. The update simply brings the naming convention of the app to meet with
the Windows Insider program – it unifies it all.
One thing that has changed is that you can now login with your Microsoft account (the one that you registered when you signed up for the Windows Insider program). In the old Phone Insider app you could only sign in with a Microsoft domain account.
Right now there are no new apps through the Windows Insider for Windows Phone app. It’s essentially a place holder for what will be coming next month. However, if you are going to want to try Windows 10 on your phone you will need to be in the program and have this app installed on your Windows Phone(s).