Medialets is a popular mobile rich media ad server and SDK provider,specializing in mobile rich media specifically, Medialets has a large penetration in the market for both online publishers and digital publications like e-magazines. Medialets offers its own SDK for integration into iOS, Android, and BlackBerry applications and provides a suite of analytics to measure the effectiveness of your campaign. Because Medialets is an SDK provider working within the application environment, it can offer great targeting including time of day,geolocation, app content, device type, and connection status.
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http://www.medialets.com/