PI is a stronger product than Andro PC (APC), with significantly higher levels of androstenone. APC is a good product because it does contain some pheromones and has a great scent to it. But if you\'re really looking for a strong product that you could use alone I\'d go for something like Attraction (which has high levels of both androstenone and androstenol), Andro 4.2 (which has 4.2mg of androstenone), or Primal Instinct (which has 5mg of androstenone).