Agree with MasterSword1080 - it would be great to see a Universal Windows App that works on Windows 10 Mobile. I use F.Lux on my Windows tablet to read in bed, but it would be nice to have this feature on my phone in the evenings. My understanding was that Windows Phone 8/8.1 was unable to support a feature like f.lux but I don't know if the situation is different know with Windows 10. If so - I would love an f.lux app!