Here I'd like to recommend a tool for you, this android
Backup assistant can help you back up your data like contacts, text messages, memos and of course apps from android to pc.
We have already showed you an easy way to create a backup from your installed apps, but this tip shows you how to transfer APK from Android to PC. Save APK files on your computer by doing as follows:
1. Download, Install, and open AirDroid (Download AirDroid from Google Play)
2. Type the IP Address given on the app, on a desktop browser
3. Accept the connection on your Android device
4. Now on your desktop browser, click Apps and then you should see the list of installed apps on your device
5. Use the check box left to each application and check each app, you would like to save APK file to PC
6. Click Download