APK Share & Backup is a free app and does not require you to root your Android device to use it, which means anyone can use it. Also, it even lets you share and backup system apps. It is a very useful tool indeed, especially if are unable to install an app on your device from the Play Store. APK Share & Backup is quite simple to use. Just install the app from Play Store and open it. It will list all apps, including system apps installed on your phone.
Just select an app that you want to back up or share. Then tap “Backup” if you want to back up the app as an APK file or tap “Share” to share the APK with someone via Bluetooth, Email, etc. APK Share & Backup can be downloaded from Play Store