newborntown (赤子城) is a chinese mobile internet company headquartered in beijing, china. it is best known as the developer of the solo launcher[1] , solo applock, solo lock.[2] up today the solo system apps gained over 500 million users worldwide .[3] newborntown is regarded as one of the fastest growing startups globally for the year 2014-2015. the company successfully finished series c round financing in august 2015 with several hundred million in cny, valuing the company over 500 million in usd.[4] its well-known products solo system apps (solo launcher)[5] were awarded as global best apps in 2015, while the development teams were also entitled as google play top developers.[6] [7]