Applico operates as an independent IT agency that specializes in mobile solutions. This American company offers robust development for the Android operating system, which is available in multiple editions. Backward compatibility is an important aspect of any solution for smartphones and tablets. This agency makes sure that its publications work on early versions of the Android system, including Jelly Bean, KitKat and Lollipop. A single syntax can be used to define the behavior of apps on all editions of the world's most widely used mobile operating system. Java plays a key role in the creation of custom apps that are readily available for download on Google Play and other web portals. This open source language has to be deployed in the Android Studio or Google Firebase suites. The developers at Applico know how to correctly write codes and scripts in an integrated development environment (IDE) that's designed for Android technology.