The Vocal Coach app, developed by Annabel Williams Music Ltd, is a comprehensive tool designed for singers of all levels. With Annabel Williams, a renowned vocal coach for celebrities and TV shows like X Factor UK, as the driving force behind the app, users can access warm-up and development exercises tailored to strengthen and enhance their voices. The app offers exercises in varying difficulty levels - easy, medium, and hard - allowing singers to progress at their own pace.

Users can create a personalized workout routine by selecting their preferred exercises and setting practice reminders through the app's calendar feature. The Vocal Coach app also includes vocal health tips, male and female key options for exercises, and testimonials from industry professionals like Sharon Osbourne and James Arthur. Additionally, the app provides subscription options for further access to its features.