IAPP may refer to:
Science and technology Islet amyloid polypeptide, a protein produced by the pancreatic beta-cell that has been linked to type II diabetes Inter-Access Point Protocol (IEEE 802.11F), an optional extension to IEEE 802.11 that provides wireless access-point communications among multivendor systems iOS application or iApp
Organisations International Association of Panoramic Photographers International Association of Privacy Professionals International Association of Parliamentarians for Peace