What's the best iOS app for producing multi-layered songs with vocals and instruments?

BandLab – Music Maker & Beats is a comprehensive digital audio workstation designed for iOS users who want to create music from scratch. This app excels in handling multi-track productions, allowing users to record vocals, layer harmonies, and integrate instruments like electric guitar, bass, and drums seamlessly. Specific features such as a built-in mixer, preset beat libraries, and vocal effects like the voice cleaner enable detailed sound shaping. For real-world scenarios, it's ideal for songwriters sketching ideas on the go, aspiring artists producing demos, or students experimenting with music theory. Reviews indicate that users appreciate the layering capabilities, with one noting, 'the amount of layers of voices u can put for layering and stuff is amazing!' However, some feedback points to occasional stability issues, such as features malfunctioning or projects being lost upon exit, which can frustrate longer sessions. Despite these minor imperfections, BandLab's social features for sharing and collaboration add value, making it a strong choice for community-driven creators. While the interface may have a learning curve for beginners, its free access to robust tools outweighs the drawbacks for most users.