Phasers come in all shapes and sizes, some are optical, some have fancy feedback loops and others have more "stages" than you can count on both hands.
The Ripple from JAM Pedals has none of those things.
In fact the Ripple is about as simple as Phasers come and all the better for it. You see, as you increase the number of "stage" on a phaser it becomes more spacey with a lot more going on. To maintain the prominent phasing sound, 2 stages reacting with one-another without any further interruption will produce you the tones you'll recognise from classic Van-Halen, Pink Floyd and many others.
The single control leaves no room for mistakes, turn it up and it gets faster, turn it down and ... yeah you get the idea. Sometimes, simple is good.