If you don't have internet to download app from Google play then don't vary, if your friends has that app then install App Backup & Share then take the backup of the installed app i.e .APK file.
Then share it using
1. A good UI for below 4.0.
2. Good experience for 4.0 and greater.
3. Share between Bluetooth and email.
Enjoy it. If you like then share it,rate it & like it.