What are some alternatives?
When comparing aDownloader and Android Torrent Client, you can also consider the following products
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
PicoTorrent - PicoTorrent is designed to be a tiny, easy-to-use BitTorrent client with low memory usage.
µTorrent - Looking for a torrent site to download movies, music and more? Choose from top torrent sites like The Pirate Bay, RARBG, 1337X, and dozens more. (October 2019)
Transmission - Transmission has the features you expect in a BitTorrent client: encryption, a web-based interface...
LibreTorrent - LibreTorrent is a Free as in Freedom torrent client for Android 4 and later, based on libtorrent.
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.