iPhone: Open ZIP file - how it works

Opening ZIP files on iPhone is no longer a problem.

If you have iOS 8 installed on your iPhone, you can easily open ZIP files that were sent to you via the messaging app or WhatsApp. Simply tap the file directly in the respective app. The file is then opened in the preview.
In older iOS versions, keep the ZIP file pressed until the options open. Then select "Overview".
As of iOS 11, you can also open ZIP files from the DropBox. To do this, open the Files app and tap on the desired object.
If you want to open and edit a ZIP file on your iPhone in a specific application, you can do that. To do this, however, you have to preview and tap on "Share" at the top right. Now you can choose the app you want and open the file there.

Pack and unzip ZIP files with iOS apps

If you not only want to unzip ZIP files on your iPhone, but also possibly create ZIP files, download a suitable app on your smartphone.

WinZip: # 1 tool for zip / unzip: The free app opens and creates ZIP files. The app can also open RAR formats.
WinZip Pro: zip, unzip & rar: For 5.49 euros (as of September 2019) you can download the app on your iPhone without annoying advertising and with additional functions.
iZip - Zip Unzip Unrar: This iOS app is free again. You not only unzip ZIP files, but also a lot of other formats. You also compress files, pictures or videos from your photo album.