“…Recently, several testing approaches such as Automated testing (Prathibhan et al , 2014), Cloud testing services (Huang, 2014b; Bhojan et al , 2015; Huang, 2012a; Starov, 2013) and industrial crowdtesting platforms or companies (Huang, 2014b; Alyahya and Alrugebh, 2017; Mao et al , 2017; Starov, 2013; Huang, 2012a), MyCrowd QA[2] and Pay4Bug[3] have been built to address the compatibility issue. However, the issue still remains.…”