Mois app is a musician's tool that offers features such as vocal removal, audio separation, smart metronome, pitch changer, chord detection, and more. It is designed for education, business, and personal use, and offers an API for integration into other software. Mois app has received positive feedback from professional musicians, drummers, and producers, and has been featured in the Apple App Store and Google Play. Mois app offers a free and paid version, and has a limit of five songs per month for the free version.