Virtual analog synthesizer with decent sound quality.

Features:
• 10 Simultaneous Notes
• Three Oscillators (Sine Triangle Saw Pulse)
• Continuous PWM
• Hard Sync
• Four Analog Style Envelope Generators
• Modified Moog Style Resonant Low Pass Filter.
• Studio Quality Reverb
• MIDI Support
• Sequencer and Arpeggiator

There is an In-App-Purchase which permits recording its output and permanent saving of presets. (In the free version user presets are deleted on restart.)