Avoiding redundant presentation of content

A system, comprising:

• a processor programmed to initiate executable operations comprising:
• accessing, by a first application executing on a client device, a content;
• presenting, by the first application, the content to a user;
• responsive to the first application presenting the content to the user, storing, by an operating system of the client device, into a database metadata identifying at least the content;
• accessing, by a second application executing on the client device, the content;
• responsive to the second application accessing the content, the operating system determining that the first application already presented the content by accessing the metadata in the database;
• and
• responsive to the operating system determining that the first application already presented the content, the operating system indicating to the second application not to present the content.

A computer program product comprising a computer readable storage medium having program code stored thereon, the program code executable by a processor to perform a method comprising:

• accessing, by a first application executing on a client device, a content;
• presenting, by the first application, the content to a user;
• responsive to the first application presenting the content to the user, storing, by an operating system of the client device, into a database metadata identifying at least the content;
• accessing, by a second application executing on the client device, the content;
• responsive to the second application accessing the content, the operating system determining that the first application already presented the content by accessing the metadata in the database;
• and
• responsive to the operating system determining that the first application already presented the content, the operating system indicating to the second application not to present the content.