killer app

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kill′er app′

a computer application that surpasses its competitors.
References in periodicals archive ?
By definition, a killer app is an application that has broad enough appeal that it becomes pervasive throughout the industry.
Myth #3: A killer app is not necessary for the success of the industry
Word processing, spreadsheets, desktop publishing, e-mail and the Web are considered good examples of the killer app.
And indeed, how much room is there for a killer app in a world shattered into countless niche opportunities by the centripetal forces of the Internet?
The killer app for CD towers was the otherwise humble telephone directory.