For ZIP and GZIP formats, It provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip.

Supported unpacking: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, and Z.

Supported packing/unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM.

High compression ratio in 7z format with LZMA and LZMA2 compression.

And the app compresses to zip format 2-10% better than most of the other zip compatible programs. Usually, It compresses to 7z format 30-70% better than to zip format.

You don't need to register or pay for 7-Zip Compression ratio results are very dependent upon the data used for the tests. You can use 7-Zip on any computer, including a computer in a commercial organization.

The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions. Most of the source code is under the GNU LGPL license. With these tools, you can easily send large quantities of information or open compressed files you receive without hassle. 7-Zip is a file archiver with a high compression ratio.

Instal the new for ios 7-Zip 23.01