ClearSkyRFI predicts radio frequency interference from satellite constellations during radio astronomy observations. Given an observatory location, observation target, and time window, the tool identifies interference-free observation windows using a two-stage pipeline combining SOPP coarse visibility screening with a gain-based beam filter. Both Airy disk and manual top-hat beam models are supported. Results are exportable as timestamped CSV files and animated sky plots. A PyQt6 graphical interface is provided, with pre-built installers available for Linux, Windows, and macOS.