A Guide to Free Apk Downloads. Majority of people nowadays have smart phones which are either windows, Mac or Android OS. Android is the most preferred app by smart phone users. Since Android is an open source platform, any manufacturer can install it on their phones. The cost of production has, therefore, gown down due to the availability of the free OS. Various apps are coming up every day, but the most common ones are the android apps. When an app is fully developed it can carry a variety of files and folders. These define its functionalities and resources. For one to be able to operate the app on the cell phone, they need to create an archive that has all the necessities. The archived folder is commonly referred to as APK. Runnning an app in a mobile phone requires some special data and files that are found in an android package kit. The package kit has a code that determines its capabilities and functions. The other name for the source code is the classes.index. The APK also comprises of the manifest file. Some of the functions of the component is to provide specifications for permission to the application’s needs, package, it’s flow, signatures, certificates, version codes and SHA-1 Digest. Another important component of the apk is referred to as libs. This is a directory that compiles codes or jar files used as the library for the application. The asset component has a directory that files texts, fonts and audio. The resources component is the element which defines the layout for the various pages of the app. Other directories contained in the kit includes META-INF and res. Development of an app requires that it is tested before release into the market. The developers of the app generate an export app where they sign in the application with secret code. This is done to prove of their authority over the application. Uploading of the app in to the Google play store is done to allow users download it. When one is downloading the app from sources such as Google play store, the APK is the one that is downloaded and installed on the phone. APK MIRROR is the other online platform that provides clients to access android apps. Applications found in Google play store can be downloaded in the APK MIRROR. Having an account is not a requirement when one is using APK MIRROR to download android apps. During uploading and downloading of applications, high-security measures are provided so as to provide highly trusted and original apps to the users in the play store. Some of the security measures include verification of certificates and check of authorization signatures. One of the features provided by the APK MIRROR is the ability to provide older versions of the app if one is not satisfied with the new one.