Some intriguing details from NPR about when listeners tune in for its programming—and what platforms they use. For instance, the iPhone app is by far the most used mobile option, peaking during morning drive/commute time while the iPad app and the mobile site spike in the late evening. NPR.org‘s primetime is mid-afternoon on weekdays, averaging more than 70,000 uniques around 2 p.m. when radio listening is at its workday lowest. Check out the slides below for an hour-by hour look.

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