http://mobile.theverge.com/2013/10/22/4863048/instagram-official-windows-phone-app

More good news for WP8 users. Long overdue, but the barriers between the app stores are falling.

6tag has always been available for Windows Phone 8 and its now a superior instagram client than the official version on iOS and Android.

Features that have been added to 6ag instagram client appear on the official releases on Android and iOS a few weeks later.