DESCRIPTION
Android Installation: If you download the .apk, please make sure that the filename hasn’t changed after the download, some phones change the extension to .zip for security. If that’s the case change it back to .apk and install. If this doesn’t work, try using a different file manager to open the file.
Pixel Phone: Then use a 3rd party file manager to look at the download. It will have .zip at the end of the name even though you chose the .apk file. Delete the extra extension and then save it.