free on demand music streaming - SMARTPHONE
Slacker‘s premium mobile music service is now offering on-demand mobile music streaming for $10 per month. Slacker’s free music service generates a station for you based on a song or artist and finds ... Liliputing: Spotify to launch free, on-demand music streaming service in the US I don't think there's any difference in meaning, although "free of charges" is much less common than "free of charge".
Context Explanation
Regarding your second question about context: given that English normally likes to adopt the shortest phrasing possible, the longer form "free of charge" can be used as a means of drawing attention to the lack of demand for ... Spotify is a wildly popular online music service that lets you play millions of tracks on a computer, smartphone, or other supported device free of charge. The service is currently available only in ...