Sonic Synth is described as a very capable FM Synthesizer app with 3 oscillators. Here's the description from the app store...

Every oscillator is independent and can generate 4 wave forms. The app works with 44100 Hz sample rate so the sound quality is great.

The touch keyboard is very responsive and dynamic - feels like a real instrument. Keys are big enough.

The last wave form is our secret algorithm for string sound also generated by the oscillators.

Variety of sounds can be created and even changed real time while you are playing using the setting of the 3 oscillators of the synthesizer.

Sonic Synth Features:

• 3 oscillators
• 4 wave form types for every oscillator
• volume, modulation, tone and detune for every oscillator
• envelope filters (attack sustain release)
• multitouch
• fast and usable piano keyboard

Pricing and Availability:

$2.99 at the app store.

More information:

• Aleksandar Mlazev

• New FM Synth For iPhone And iPad 27-Jun-17