red-moon

Like I said in another comment: https://github.com/LibreShift/red-moon with a more complicated pattern than just a single color may be all you need for many use cases. I don't think Android has an easy to use global shader system, so you'll be stuck with overlay windows and the incompatibility they have with banking apps/DRM crapware that locks you out of your own screen without root access.

Back in the day before operating systems copied the feature there were tons of Android apps that added a red shift on top of your screen by drawing over other applications (i.e. https://play.google.com/store/apps/details?id=com.csk.app.sh..., https://github.com/LibreShift/red-moon). This usually breaks/doesn't work with banking apps and other such secure contexts but for most apps that's probably fine. Sounds like you should be able to do this by just modifying Red Moon to draw a more complex overlay. If the entire screen is affected equally, the stock app may just be all you need!

It's not a startup and the alternatives are not competitors, but I've had a similar experience affecting my motivation to work on Red Moon. There's two other screen filter apps on F-Droid, and at one point I proposed that we [work together], either merging our apps or creating shared libraries. While the other devs initially expressed some interest, they weren't willing/able to put in the effort and nothing came of it. This has killed my motivation to work on Red Moon. It feels like a waste of time, duplicating other people's efforts. That's not intrinsic to other people working separately to solve the same problem. If Red Moon were an educational project, or if it took a unique approach to screen filtering (like the other project I'm part of and [crowdfunding]), then I'd feel differently. But my main motivation was creating a FLO screen

Easy, but it's still work. As a thought experiment: if it's so easy, would you be interested in doing it for me? (edit: Obviously not, but compare your internal resistance to if I'd asked you to do something trivial like fix a typo in the readme) Here's the file I was referencing (only 100 lines!): https://github.com/LibreShift/red-moon/blob/master/app/src/m... Here's the issue I've been putting off fixing because of it: https://github.com/LibreShift/red-moon/issues/208 The problem is that right now there is one PAUSE state, which is triggered by both manual pauses (brightness should be restored) and automatic pauses (in secure apps; brightness should not be restored). The problem wasn't exactly DRY, it's the misapplication: I merged bits that had identical code, but turned out not to have identical purpose. And, for posterity, here's wha

I have a legitimate accessibility reason for it, to help epileptic users. https://github.com/LibreShift/red-moon/issues/253#issuecomme...

Hey, just a heads-up to inform that I installed the debug version from here[1] and it's working p-e-r-f-e-c-t-l-y in my good old Android 4.0.4 device (Spanish locale). Kudos. [1] https://github.com/LibreShift/red-moon/issues/152#issuecomme...

I'm planning to in the next release. There might be a few visual bugs, particularly with RTL languages, but that's no reason to wait; better to just fix them as they're found. Existing issue: https://github.com/LibreShift/red-moon/issues/152