2 ms·

Makes sense for an apk to be a zip file. Apps were supposed to be written in Java and that has always shipped binaries in zip files (jar or war).

• bombcar 7mo ago
  There are many "file formats" that are just relabelled zips - the hard part is always reconstructing it after making a change.
  • tosti 7mo ago
    That's because zip is really just the first layer.