Internet based digital content services, as well as mobile client devices for accessing the Internet based digital content services, are herein disclosed and enabled. In one example, user digital content, such as documents, audio, or video content, may be uploaded to a content server for storing. The user may share the user digital content with other client devices or users having appropriate authentication or security procedures. A user play list or rendering list may include a list of pointers or references to the user digital content. The stored user play list or the stored user digital content may be further edited, stored, or shared subsequently for access and rendering. The Internet based digital content services are accessible by smart devices, such as smart phones, information pads, TVs, audio output devices, and printers. The smart devices that access the Internet services may require client software for accessing the Internet services.