BitTorrent is the original and very first torrent client, which was developed by the creator of the torrent protocol itself.
The program has become a very functional system over its history, therefore, in order to use the full-featured version of BitTorrent, you will need to pay, although it, of course, has a free version, but it has ads and only basic functionality, which is why this torrent client we indicated at the very end.
Official site - https://www.bittorrent.com/lang/ru/