The acoust IQ app turns an iPhone or iPad into a high-performance Class 1 sound level meter with a compatible external microphone. It provides a guided, standards-compliant workflow from acquisition to documentation, including psychoacoustic parameters, non-destructive editing, metadata capture (images, notes, GPS/Galileo, speech-to-text), template-based reporting and export. Designed for professional use in industry, environmental work, construction and research.