I just switched from an iPad to an eInk tablet and I was forced to abandon my LingQ membership, because in greyscale, unknown words and LingQs look the same.
Even without a full greyscale implementation, if you at least allowed us to switch off the blue highlighting for unknown words just keep the yellow highlighting for LingQs, it would make a big difference and basically would make LingQ usable on eInk tablets.
This would be super useful! I would like to use LingQ on an Eink device. I see reports that it works on color devices but these are expensive and have other downsides. I imagine some simple setting to change the highlighting would make it usable on B&W devices.
Kindle is locked to Amazon products, so it’s unlikely LingQ will be usable on a Kindle. But there are other E-Ink devices with Android functionality (such as Onyx Book) so it would be worth optimising it for those.