scroblr is described as 'A lightweight browser extension that “scrobbles” the music you listen to on the web to your Last.fm account. Currently supports scrobbling from: Pandora, Turntable.fm, Google Play, Amazon Cloud Player, AccuRadio, Bandcamp, Grooveshark, Jango, Rhapsody, Songza, Twonky and we7' and is an app in the web browsers category. There are five alternatives to scroblr for a variety of platforms, including iPhone, iPad, Blackberry 10, Last.fm and Mac. The best alternative is Simple Scrobbler, which is both free and Open Source. Other great apps like scroblr are CloudScrob for Last.fm, iScrobbler, scroBBle and QuietScrob.
CloudScrob updates your online profile without ever syncing to a computer. Each time you open it, CloudScrob scans your music library looking for updated play counts, then notifies you and sends them to Last.fm.
Leave QuietScrob running in background and it will scrobble all music you listen • Scrobbles from default Music app and some third-party players while running in background • Tracks rated with 5 stars will be added to loved on Last.