Ask.fm is a social networking website where users can ask other users questions, with the option of anonymity. It has become quite popular among teens and Ask.fm has released their iOS and Android apps. Last year, they revealed their plans to develop an official Windows Phone app, but so far no update on it from them. If you are a Ask.fm user and missing the official app, there is a new 3rd party app in Windows Phone Store which serves the purpose well.
It has a simple, intuitive interface and includes all basic Ask.fm features such as following anyone, receiving your questions anywhere and answering them, attaching your photos in answers and more. This app also includes Windows Phone platform features such as Live Tiles and lockscreen information support as well.
Download it here from Windows Phone Store for free.