Vowch, an app launched by New York's Tippt Media, is a unique take on the personal recommendations space. By allowing users to vouch for various interests -- from food items to celebrities to music -- they can earn points and build themselves up as an "influencer," which increases their visibility and clout on the network. "We wanted to build a platform that in 30 seconds or less allows you to quickly give your friends a rich picture of what you're into and a taste of why you're into it," says David Parker, who co-founded the app with brother Jeremy Parker and Jesse Itzler.

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