In this generation of smartphones there are innumerable android phones around and many interesting apps are produced everyday. You might like an app on your friend’s phone and want to get it. You can simply get the app from the playstore but why waste bandwidth? Just get the app using bluetooth, sounds tricky, huh?? Here is a way by which you can do that!
Step 1: Download and install App Backup & Restore from https://play.google.com/store/apps/details?id=mobi.infolife.appbackup on the device from which app has to be taken.
Step 2: Open the app and select the app which has to be sent and click (or touch) on Backup.
Now an apk of your app is created and you can get it from SDcard/App_Backup_Restore
Step 3: Send the apk via bluetooth to other devices.