Shazam has 100m monthly active users

Shazam just breached the 100m monthly active user mark. It has been downloaded to 500 MILLION devices. Proper UK tech success story #shazam
— Nic Fildes (@LovesickHank) August 20, 2014

Earlier - 300m 'users' reported in Feb 2013, which I assume is an earlier version of the 500m number