Windows Phone 7 was introduced by Microsoft in 2010. It had a touch-based interface with three hardware buttons and supported augmented reality applications. Developers could create apps using Silverlight, XNA, or as web apps connected to cloud services. The Windows Phone 7 platform provided tools for developers in Visual Studio 2010 and supported common .NET and Windows frameworks. It aimed to provide an integrated experience across the phone, cloud services, and business systems like Exchange and SharePoint.