INOOR is a modern, Python based application designed for astronomical data reduction (create master and calibration) from FITS files, multi-frames aperture photometry and astrometry. Built with a clean Model-View-Controller (MVC) architecture and a responsive PyQt5 graphical interface. INOOR provides a robust and user friendly interface and experience for astronomical research and data processing specifically for 3.4-m telescope of Iranian National Observatory (INO340)optical observations.