Fragrance Primer

Has anyone used fragrance primer?  if you did, did it work as intended or not.

I am not sure if what you mean by fragrance primer is a product like the "Exponential day boost" (the one made by Juan de Hueleme Mucho). If so, yeah, years ago I tried Eau du Jour. The company claimed this booster would enhance citrus notes and make your citrus perfume last all day. To be honest, I never noticed any difference or improvement in projection of my fresh/citrus fragrances whatsoever.

Fragrance primer is a preparatory skincare product applied to pulse points before perfume to significantly extend its longevity, sometimes up to 24 hours.  Specifically a product from optimal habitat fragrance extending primer.