bz12 I've written up a guide that explains how to disable anti-aliasing in Windows 10. It took me a bit longer than expected to write, hence the delay in replying. It's too long to enter here so I've put it up on another site. Here is the link:
https://superuser.com/questions/1762568/how-to-disable-font-smoothing-anti-aliasing-in-windows-10
Don't be put off by the length, most of that is just my wordy explanations. The actual technique is quick and easy to apply.
The same cannot be said for disabling anti-aliasing in Android, that's altogether more challenging.
There is no setting to 'turn off' anti-aliasing in Android, nor is there an app for that. Anti-aliasing is hardcoded 'on' deep in the Android code, the only way to turn it off is to modify that code.
My method relies on replacing one of the core Android system files with one that I've modified to block the system call that turns on anti-aliasing. On most Android phones this is impossible, you can only do it on phones that have the option to unlock the bootloader (xiaomi/poco, google pixel, motorola, oneplus, sony, possibly some others). Furthermore, my method will only work on phones that are running close to stock Android (ie no or minimal modifications from standard Google Pixel Android). Once your bootloader is unlocked you will have to 'root' your phone by installing software called Magisk and then use Magisk to install a small piece of code containing my modified system file. All that requires you to connect your phone to a PC and use special software called adb and fastboot to manipulate your phone and install certain files.
That's just a brief summary of what's involved. A detailed step-by-step guide would be far longer. You may already have decided it's way too much trouble which is fair enough. I only did it because I had to. Ten minutes of reading Android's anti-aliased text is enough to make my eyes hurt, more than thirty minutes and discomfort turns to burning pain so the choice for me was: turn off the anti-aliasing or don't have a smartphone.
If you want the full step-by-step guide, post a reply and I'll start writing, but it might take me a while.