Beloved singer Frank Sinatra's musical life is now available as a downloadable app as fans prepare to celebrate Ol' Blue Eyes' 100th birthday at the end of 2015.

Just a week after the crooner would have turned 99 on 12 December (14), a comprehensive new Frank Sinatra 100 app has been released to iPhone, iPad and iPod Touch users.

The feature includes exclusive recordings and videos, and personal stories from family and friends.

A press release accompanying the app launch reads: "Frank Sinatra 100 is a comprehensive and evolving 'appumentary', inviting fans to step into Frank’s world, with lush, vibrant imagery showcased in several rare and previously unseen photos, a unique, full-screen Sinatra Slideshow feature, as well as exclusive audio recordings and videos, including a 1962 filmed performance excerpted from the new Sinatra: London box set.

"The app also delves into Frank’s life and career with an interactive timeline, in-depth features, interviews and personal stories about Frank from many who knew him best.