Torrent Downloader is an app that, as the name suggests, lets you download Bit Torrents directly using your Samsung Z3 smartphone. The app promises to be a fast and easy "Lightweight yet powerful bittorrent app" and gives you some powerful features, such as being able to select the files you want to download within a torrent, supports magnet links, and lets you select your desired storage location.
 

Features

• Beautifully light, clean design
• Wifi-only mode to save on mobile data
• No download speed limits and no download size limits
• Select files to download within a torrent to minimize your storage footprint
• Choose your file download location also supports external storage, like SD cards.
• Download torrents and download magnet links
• Choose between deleting torrents only, or torrents & files.

This app is available for the Samsung Z3, but there will be support added for the Z1 soon. and is now available for the Samsung Z1.