Mobile advertising network Greystripe has raised an additional $5.5 million in Series C funding led by its existing investor Incubic Venture Capital, with Steamboat Ventures and Monitor Ventures participating. The company is now aiming to solve the biggest problem in mobile advertising.

Despite massive industry projections around mobile advertising’s growth, many brands and agencies have debated the additional value in creating mobile-centric advertising formats and campaigns. Greystripe is looking to solve this issue by integrating its mobile inventory directly into industry-accepted online media buying software. This integration allows for ad agencies to simply click to add mobile and also allows for Flash advertisements, normally only available on the web, to appear on the iPhone.

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