On their own, not really, as apps are usually built by individuals or companies who have enough resources to complete the project without input from the crowd.
However, some app developers have turned to crowdfunding to raise money and market their app. One of the companies that used crowdfunding made a presentation of their experiences, which can be found here: http://www.slideshare.net/vectorbloom/why-thecrowd
On their own, not really, as apps are usually built by individuals or companies who have enough resources to complete the project without input from the crowd.
However, some app developers have turned to crowdfunding to raise money and market their app. One of the companies that used crowdfunding made a presentation of their experiences, which can be found here: http://www.slideshare.net/vectorbloom/why-thecrowd
Answer source: http://www.slideshare.net/vectorbloom/why-thecrowd