AudioKit Synth One - Free & Open-source iPhone/iPad Synth 🎹
Medly - Tap & draw to create your song. No musical skills needed.
VHS Synth - The leading free & open-source iOS/macOS music & audio dev tools. https://t.co/Ik1FiorZWH proudly powers millions of iOS app installs
Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
Surge XT - Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.
Reason Compact - Reason Compact is a smart, creative application that allows users to compose music by inserting great effects or melodies with an easy-to-use command with powerful beating tools.