RAR Extractor and Expander 4+

Content will sometimes be corrupted, missing (some files in document/folder), or even doesn’t show up at all (the entire folder)

This app does not fully unzip my files (part1, part2, part3, etc). There should be a total of 6 folders but this app only unzips 4. If I did not know what should be inside, I would be “cheated” and would have missed some important files. No warning, no error message at all. It even pops up a strange Chinese ad which looks like spam. Luckily I have downloaded another app for my purposes and I have successfully unzipped all files.

The UI is confusing, asking two consecutive times to open a folder, without hint that the first time is to select the .rar archive, and the second time is the target locaiton folder.
Also it is not possible to consult the content of an archive prior to unzip, and last there is a game advertisement embedded. Not the kind of app I would expect to see in top results of the App store.