Waifu2x in particular, is one of the oldest and still one of the best AI upscalers for anime and drawings in general, and it has always heavily favored Nvidia. The most known port was not the original Waifu2x by nagadomi, but Waifu2x-caffe, which was much more feature rich, and supported CUDA and cuDNN, both Nvidia exclusive. There was an OpenCL alternative which worked on AMD, but it was only as fast as... Source: over 1 year ago

If you need to enhance the quality of an image that isn't single-coloured; use an AI such as Waifu2x Vulkan or Waifu2x Caffe. Source: almost 2 years ago

It's open source software just as many other projects on github are. Can't really help you translate, but the program is in many languages including English the author is just Japanese Https://github.com/lltcggie/waifu2x-caffe If you scroll down you'll see some English text. Source: about 2 years ago

The settings I used for the original upscale (using waifu2x-caffe):. Source: about 2 years ago

Resolution improved to 3000x1240 using waifu2x-caffe. Source: over 2 years ago

Fairly granular I'd say, there's a bunch of customizations and workflows you could go through. I'm probably not your best resource for this though. Look here: https://macrodroid.com/. Source: over 2 years ago

I see many recommending Tasker. If you want an Android automation software, macrodroid is way easier and as powerful as Tasker. https://macrodroid.com/. Source: almost 3 years ago