Android and iOS are widely used mobile app development platforms used by a large number of people around the globe. The native application frameworks started many years back when the application word came into technology. But the native app framework has a disadvantage. It requires separate coding in both Android and iOS. This leads to an increase in the cost of application and was time-consuming. In comparison to the native app framework, the cross-platform app development framework seems to be widely accepted by the world. There should be more focus on Cross-platform frameworks in 2020 because it will bring a better and more advanced version of native app development that has brought a revolution in the app industry.