To unzip a .7z file, find it in your iPhone’s downloads folder and then long-press it to open the options. From here, choose ‘Share,’ then, from the list of app icons, select ‘Unzip.’ If you don’t see ...

Additionally, 7-Zip can compress files into other popular formats, including ZIP and TAR, while also being able to read/extract files from even more file types, such as EXT, RAR, and XAR.