I made a basic Tasker routine to automate downloading from the SubsPlease site using xdcc. You can also browse and search titles found from subsplease. Tasker itself is not required to use this apk, but all the limitations of a kid app apply. Termux and Termux:Tasker are required to be installed as well as the xdcc project. Let me know what you think and if there are any issues!
Another option is to just use Termux and xdcc manually, all you need are the pack #s and the bot name, my app is just to make automation and to search then download easier than the subsplease site. Mine also shows a notification for download progress :)
Sunxdcc can be used to find packs for non-anime stuff, but I have had little luck downloading from the sunxdcc api reliably