It is not a direct competitor to products such as Spotify, which charges depending on account type.
"The algorithm behind it gets to know what you like. It continually updates for you so it keeps you ahead of the trends in songs and music and introduces you to new artists," Ms Hastings said.
In May, Clear Channel said iHeartRadio had gained 30 million users in less than two years.
TRN, which is launching iHeartRadio in NZ, owns half the commercial stations in the country under the Coast, Newstalk ZB, Classic Hits, Radio Sport, Radio Hauraki, ZM and Flava brands.
Ms Hastings would not be drawn on the format's expected impact on revenues.
"At this point ... our job is to make sure that the platform is adopted and we get as many registered users across the country [as we can]."TRN is owned by Clear Channel Communications and Herald publisher APN News & Media through Australian Radio Network.