f.lux for iOS
Auto adjust your iOS display based on the time of day
f.lux for iOS launched on November 11, 2015 with 596 votes, #5 of 4,110 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 10 years on.
In plain words
f.lux for iOS automatically adjusts display colors based on the time of day to reduce eye strain and headaches. The app regulates screen warmth throughout the day, becoming warmer in the evening to help with sleep quality. Designed for iOS users who spend extended time on their devices, it aims to improve overall viewing comfort and potentially enhance sleep patterns by matching display output to natural circadian rhythms.
written from the facts on this page · September 2026
From the sources
f.lux for iOS is designed to give you a better experience with your computer. It regulates the colors of your display so it can match the time of the day properly. That can reduce your eye strain or your headache or even help you sleep at night.
Sideloading f.lux
Apple has contacted us to say that the f.lux for iOS download (previously available on this page) is in violation of the Developer Program Agreement, so this method of install is no longer available. We understood that the new Xcode signing was designed to allow such use, but Apple has indicated that this should not continue. The demand for f.lux on mobile devices is at an all-time high: It is proven that screens can negatively influence sleep , and we believe that f.lux makes a significant improvement, as it mirrors very closely the research on blocking blue light before bed. But as we’ve discovered, it is even difficult to conduct basic research in this area, because so many people today…from justgetflux.com
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