Polarix X by Alex Richards is a free display font defined by tall blocky silhouettes, squared edges, and rounded inner cutouts that keep the forms from feeling blunt. That contrast between hard outer walls and soft openings gives the lettering a compact, machined rhythm that feels more deliberate than generic geometric display type.
Short headlines, poster titles, album covers, streaming thumbnails, packaging, and logo concepts all make sense here. The font's dense vertical shapes and clipped joins give big words a strong graphic bar, which helps it anchor branding and title work where a cleaner sans serif would look too plain.
--
Polarix and Polarix X were constructed and originally released in 2022 through FontStruct. Their FontStruct pages are:
https://fontstruct.com/fontstructions/show/2075193/polarix
https://fontstruct.com/fontstructions/show/2075715/polarix-1
Both fonts are licensed under Creative Commons Attribution Share Alike licensing. More information is included in the text files included in the downloadable zip.