If you don't know what's an apk file of are having difficulties installing this app (after downloading the apk file from the link in the Featured Post of this blog, for example), you may want to check these links: https://www.androidpit.com/android-for-beginners-what-is-an-apk-file https://www.wikihow.tech/Install-APK-Files-on-Android Depending on you Android version the steps may be different, but it is quite easy. If you don't find the screen to allow install of apps from unknown sources, try goind to Settings and use the search box to look for "unknown sources".