Simple Unrar - At first glance a very simple archiver, but he can replace you any advanced analog. And it's just in its simplicity, the whole point is that he almost does not occupy space, and does not consume resources of a smartphone, but at the same time it can work on a level with any modern archiver. Here you will find nothing extra, no ads, and third-party applications. As everything else, supports lots of formats, and very smartly works.