# f.lux

Hacker Approved page: https://hackerapproved.com/p/f-lux/

11 people recommended f.lux in Hacker News comments, 1 had mixed feelings and 10 criticized it, November 2025 to October 2026. It was recommended in 9 of 12 months, in 11 threads. It does not meet the Hacker Approved badge rule.

**Verdict:** People recommend f.lux for shifting screen colors warmer at night, which many find eases eye strain and helps them sleep. Some find it too basic, and others say it does not help them.

Summary written by Claude from 24 comments. It was written before the November 2026 recount, and 23 of those comments still count.

## Why people recommend it

- Warmer screen tint at night (4 comments in the sample): "Shifting the white point is far more comfortable than dark mode for me." ([source](https://news.ycombinator.com/item?id=46663093)) "not only has warmer tinting but also "Darkroom mode" (red only" ([source](https://news.ycombinator.com/item?id=47710874)) "with f.lux/redshift the blue light is ok" ([source](https://news.ycombinator.com/item?id=46348867))
- Helps sleep and bedtime (3 comments in the sample): "It was extremely helpful to me, to the point where I could pinpoint basically all my insomnia nights" ([source](https://news.ycombinator.com/item?id=49125881)) "my sleep quality got much better when I turned on f.lux" ([source](https://news.ycombinator.com/item?id=47102980)) "Helped me start going to bed at 10pm" ([source](https://news.ycombinator.com/item?id=47778291))
- Long-time reliable daily use (2 comments in the sample): "That saved my eyes like 15 years ago whenever I found it" ([source](https://news.ycombinator.com/item?id=50262822)) "used to be one of my fav apps" ([source](https://news.ycombinator.com/item?id=48372153))
- Free and adjustable settings (1 comment in the sample): "Fantastic piece of software." ([source](https://news.ycombinator.com/item?id=49510081))

## What people warn about

- Breaks at high latitudes (2 comments in the sample): "setting the profile automatically breaks down at high latitudes" ([source](https://news.ycombinator.com/item?id=45858714)) "it actually makes seasonal changes so much worse" ([source](https://news.ycombinator.com/item?id=45856980))
- Night shift issues remain (2 comments in the sample): "f.lux has had an issue filed for more than 6 weeks with the solution being wait it out until Apple fixes it" ([source](https://news.ycombinator.com/item?id=49140791)) "night shift issues which are still present in f.lux" ([source](https://news.ycombinator.com/item?id=49124215))
- Some find it ineffective (2 comments in the sample): "I've noticed if I use the f.lux feature for just 15 minutes I begin to get tired at night." ([source](https://news.ycombinator.com/item?id=49229294)) "Deemed it not helpful for myself" ([source](https://news.ycombinator.com/item?id=49125685))

## The badge

A product earns the Hacker Approved badge when at least 10 people recommend it, recommenders outnumber critics at least 2 to 1 (mixed feelings count toward neither side), it was recommended in at least 4 of the 12 months and in at least 5 different threads, and no single thread supplies more than half of the people who recommend it. Health and money products are never badged.

## Cite as

Hacker Approved, "f.lux", https://hackerapproved.com/p/f-lux/ (11 recommend, 1 mixed, 10 criticize; Hacker News comments, November 2025 to October 2026).

Counts updated 3 Nov 2026, with data through October 31, 2026.