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The mSpot music service is almost identical to the Android version released in June, offering a smartphone app with a choice between live streaming and "airplane mode," in which selected songs are pre-downloaded to the user's player for playback when an Internet connection isn't available.
As users add music to their Macs or PCs, mSpot's desktop application automatically syncs the songs with the mSpot service. Of course, most music collections are much larger than the 2GB allowed by mSpot's free account, so the company's offering 40GB of space for $3.99 per month.
Finally, the inconvenience of moving music between devices is eliminated with this service. The big question we have now: Why didn't Apple offer this service a long time ago?