Here's how to download or stream torrents on an iPhone running iOS 11 without jailbreak, computer or sideloading.
Typically, the most common way for people to download torrent files directly to their iOS device is through the sideloading of compatible torrent applications onto hardware using Xcode or Cydia Impactor. There is nothing wrong with that method, but if you do not want the hassle of having to deal with retractions and ending certificates, and just want something a bit simpler, the methods below should work really well for you. Let's dive in straight away.
Step 1: First of all, you need VLC for an iOS media player installed on your iOS device to play back anything you download. You can download apps at no cost from the App Store, so go ahead and do it now if you have not already.
Step 2: Now, go to the torrent site of your choice. We will not make a recommendation here as if you've been involved in the world then most likely you will have your favorite. Find the torrent file you are interested in through the usual mechanism and then copy the magnetic link into the file.
Step 3: Now, with the copied link, go to m.zbigz.com in Safari. Paste the magnetic link copied to the text field, and press the green "Go" button. Wait for the service to process your request, and once done, you will see the torrent available with the green download icon. Choose it.
Step 4: You will now be presented with a streaming page for the content. From there, you can stream files directly if it's your preferred consumption method. However, if you want to download it, then copy the URL from the streaming page.
Step 5: Launch VLC for iOS app and go to the Download section and then paste the URL you just copied in the step above, into the app followed by pressing the Download button. This will start the download.
And so it is. VLC for iOS application will go through the process of downloading the file based on the available URL. Once done, you will be able to view or listen to files via VLC for iOS apps.
Source : http://www.redmondpie.com