Crescendo Voice is a free iPhone app developed by Giant Octopus LLC that offers acoustic piano accompaniment for vocal exercises tailored to your vocal range. Ideal for singers of all styles and levels, this app allows you to practice arpeggio-based exercises at your preferred tempo and duration.

You can create personalized exercise playlists, add instructional audio or video, and share them with others for collaborative learning. Explore community playlists curated by renowned vocal coaches on YouTube, watch instructional videos, and practice in your own vocal range. With pitch tracking and performance recording features, you can monitor your progress and export audio recordings to share with fellow singers.