Chen Hua, founder and CEO of mobile Karaoke app Changba, shared with us at TechCrunch Shanghai how the app managed to gain 100 million users in no more than one and a half years.

Mr. Chen is a serial entrepreneurs. Before developing Changba he and his team spent about one year studying how mobile services could be different from those based on PC. Of all the special traits with smartphone, including gravity sensor, flash sensor and direction sensor, Changba finally chose the combination of phone speaker and earphone.

He labels Changba as an Instagram for voice. Similar to Instagram which enables ordinary users to produce beautified pictures and share with friends. Changba is for enabling the ordinary to record singing and share to social networks. Changba also offers tools to optimize your singing.

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Tracey Xiang

Tracey Xiang is Beijing, China-based tech writer. Reach her at traceyxiang@gmail.com