Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
AudioKit Synth One - Free & Open-source iPhone/iPad Synth 🎹
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
FL Studio Mobile - Create & save multi-track music projects on a smartphone
zMors Modular - Full featured modular synthesizer for iOS
GarageBand - GarageBand is a fully equipped music creation studio for Mac