F.lux
People mainly take F.lux for sleep. Based on 4 first-hand reports. Ranked #781 of 1,974 overall.
21
User score
Mostly positive50% positive25% mixed0% negative25% unclear
Of reports that state an outcome, 67% are positive.
Clinical research
Research pending
What F.lux does, according to users
Of the people who reported each effect, the share who said it got better.
betterno changeworse
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Research data for F.lux is being compiled.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
nightlyas reported
dailyas reported
eveningas reported
Reported side effects
How often each side effect came up across all reports.
No side effects reported so far.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Been using F.Lux for many years it helps more against eye strain and headaches but getting quality sleep seems to have more to do with how you activate your mind”
“I set F.lux to the 'candle' lighting setting and it makes me really sleepy.”
“Regardless, use flux in the evening. iOS 9.3 is coming out in like ~3 weeks and features a native flux like option called Night Shift.”
“all my devices have the blue wavelength attenuated via software like Flux”
Top discussions (4)
- SLEEP is the best nootropic, so get the F.LUX program and fix your computer's influence on your sleep! ↗
- What are the effects of prolonged melatonin usage? ↗
- What are the most effective nootropics you've found for significantly increasing the quality of your sleep? ↗
- Sleep, we know it's important but can we minimize it? ↗
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User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate