TBStuff describes iTuttle as an awesome fat and warm subtractive monophonic synthesiser for iPad. Here's what they have to say about it in their own words...
Fat by Design with its 9 oscillators section, all waveforms (but Sinus with oscillators) use generalized PWM (called "Ratio"), so you can tune/modulate the waveform of each oscillator / LFO.
Its huge modulations capabilities lets you create a very large sound styles.
The arpeggiator includes an 8 steps sequencer and lets you mute, change the gate duration, the groove and the velocity of each step. In addition, you can use the global Shuffle to humanize your arpeggios. It also sends its notes to MIDI Outs.
Pricing and Availability:
£6.99/$9.99 at the app store.
Free iTuttle Lite version also available
Seamless audio and MIDI switchover between computers