ソングブック is a comprehensive music app developed by GENIT Inc. for iPhone users. With over 1300 songs in its repertoire, this app is a must-have for music enthusiasts.

One of the standout features of ソングブック is its ability to transpose all songs to different keys with just a single tap. Whether you're a jazz aficionado or a fan of popular music, this app has got you covered. From timeless classics like "All Of Me" and "Fly Me To The Moon" to Japanese favorites like "いつか王子様が" and "となりのトトロ," you'll find a wide variety of songs to choose from.

ソングブック offers a subscription plan that gives you access to all of its features. With options for monthly, quarterly, and yearly subscriptions, you can choose a plan that suits your needs. The app is available for free, but the subscription unlocks its full potential.

Please note that ソングブック is licensed under JASRAC (Japan Society for Rights of Authors, Composers, and Publishers) and holds the license number 9019155001Y38026.