The alternative format (used by the Internet Archive and Wayback Machine) is WARC. It's also a single file, but it's preserving the HTTP headers as well; so its applications is specifically for archival purposes. [1] The "wget" tool which is co-maintained by the Web Archive people also has support for it via CLI flags.
Though when it comes to mobile browser support I'd recommend to use MHTML, because webkit and chromium both have support for it upstream.
The alternative format (used by the Internet Archive and Wayback Machine) is WARC. It's also a single file, but it's preserving the HTTP headers as well; so its applications is specifically for archival purposes. [1] The "wget" tool which is co-maintained by the Web Archive people also has support for it via CLI flags.
Though when it comes to mobile browser support I'd recommend to use MHTML, because webkit and chromium both have support for it upstream.
[1] http://iipc.github.io/warc-specifications/
[2] https://www.gnu.org/software/wget/wget.html