ScrobblOrDroid is saving songs in the App and is uploading them to last.fm as soon as an internet connection is available (even if you restartet your device in the meantime). In addition, ScrobblOrDroid shows you the latest scrobbled songs which will be loaded directly from last.fm.
Please note, ScrobblOrDroid is currently only working with the Android Standard Music App.
ScrobblOrDroid is neither showing any advertisement nor provides any in-App purchases. It is to 100% free.