The online ToneSavvy exercises are free to anyone who wants to hone their music skills. Teachers who want to design customized assignments for their students and track scores and their students' progress can subscribe for a low fee — view the details on the pricing page. ToneSavvy is run by David Crane and Rob Whelan. David Crane is the original developer of TonedEar, while Rob Whelan is the original developer of eMusicTheory. These two music theory sites were merged to create ToneSavvy.