Instagram had released a Windows Phone app in the store Two years ago as Instagram Beta. At that time, they also promised regular and feature-filled updates. It seems that misadventure is finally finished. But since the launch and till today Instagram updated their app only once. The app remained in Beta stage and today finally it is removed from Windows Phone 8 store. Now searching Instagram Beta on Windows Phone Store will not return the old app listing. No need to worry about all WP 8 users, you can download Instagram app 6tag which is much much better than the offical app and is updated regularly with new features.
Instagram now has a Windows 10 Mobile (Beta) app only on Windows Platform which is scheduled to become a UWP app and can be run on Windows 10 PCs. This app is currently far from offering a good consistent experience but the good thing is it is updated regularly.