People have been able to sign in to apps and websites with their Facebook and Twitter IDs for a while. Now they can do it using Google+, the online identity they’ll have if they’ve been signing in to YouTube, Gmail and other Google services. Shazam is one of the first apps to take advantage, as well as radio app TuneIn (with The Guardian, OpenTable, USA Today, Fitbit, Flixster and Banjo among the non-music-related launch partners too). Google also has Facebook in its sights, saying it’ll give users more control over which activities are shared on Google+ from these apps than Facebook’s infamous ‘frictionless’ sharing. “Google+ doesn’t let apps spray ‘frictionless’ updates all over the stream, so app activity will only appear when it’s relevant (like when you’re actually looking for it),” explains the company, complete with a “spraying is just spam” subhead.