Instagram, Pinterest, and Flickr are popular photo sharing platforms. Instagram allows users to share photos and videos with friends through a mobile app. It launched in 2010 and gained popularity through its photo filters and hashtag features. Pinterest launched in 2009 and allows users to organize and share things they find online through creating and following theme-based pinboards. Flickr is a photo management and sharing site that has been around since 2004, allowing users to store, sort, search and share photos online through a website and mobile apps. It also has tools for users to display their Flickr photos on other websites and apps.