100 Greatest Singers introduce 101 classical singers, including the legendary Caruso, Callas, Pavarotti etc. You can search the singer with A-Z indexing or in voice typed categories: Soprano, Mezzo-soprano, Contralto, Tenor, Baritone and Bass. The library includes 32 sopranos, 10 mezzo-sopranos, 8 contraltos, 30 tenors, 12 baritones and 8 basses. Each singer has a photo, full biography and an mp3 song, so 100 singers gives you 100 songs, including "La donna mobile", "Ombra mai fu", Queen of the Night - "Der Hölle Rache", "Si mi chiamano Mimi" etc. The songs are already in the app, no need for internet connection. There is a songs list table for you to search through the 100 songs. Beside the songs, each singer has two YouTube video links, so you can watch the singer sings. (YouTube needs internet connection.) There is also a file to introduce the voice type, and how you can determine the voice types. If you like listen to art songs and operatic aria, this app is just for you! *This app is optimized for iPhone 5 and iPod Touch 5!