But what makes this app extra special, is the creator's relationship to the band. It was not envisioned by the next up-and-coming software developer or consultant, but rather 81-year-old Jac Holzman, founder of Elektra Records.

Holzman signed The Doors in 1966, sixteen years after starting the record company as a teenager. He remains one of the music industry's most passionate and persevering tech nuts.