Free mobile app analytics & demographics from Quantcast

Nice. Goodreads data: https://www.quantcast.com/p-0dUe_kJAjvkoY

How does this differ from what Flurry provides?

Quantcast is a direct measurement provider for more accurate mobile app demographics and provides six categories of demographic segments: Household composition, Income, ethnicity and education, while Flurry has only age, gender and interests.

Seems like flurry only gives age and gender data: http://www.flurry.com/flurry analytics.html#insight

Very cool!