The best 10$ I could spend on a synth. Easy to use with many features and beautiful interface. 2 oscillators produce basic saw, square, triangle and sine waveforms which can be further edited in OSC tab. Has all basic FX (Reverb, delay, chorus, phaser) 4 voice unison, 16 step arpeggiator 16 step gate, 3 envelopes (main + 2 customizable) 2 LFOs, 3-band EQ and few more things.Interface is very clear, window size is perfect for my screen and there are few UI skins to choose.
I have just bought it and already love it. It's exactly what I was looking for - simple subtractive synth with all basic features to use along with my other favourite synths like GMS and Harmless. The program bank is rather small though (65 presets).