Dimsome vs f.lux.
f.lux is free, powerful and has been around for years. Here is an honest look at where Dimsome is different.
Choose f.lux if.
You want a free tool, you use Linux, or you like fine control over colour temperatures, presets and effects. f.lux is excellent at that, and has been for over a decade.
Choose Dimsome if.
You want it simple, the same on your phone and your computer, slow enough that you never notice it fading, and you want the backlight left at full power so the screen does not flicker when it is dim.
Side by side.
| f.lux | Dimsome | |
|---|---|---|
| Price | Free for personal use | €6.99 a month or €54.99 a year |
| Computers | Windows, Mac, Linux | Mac, Windows |
| Phones | No current phone app for most people | Android, iPhone coming |
| Schedule | Location and sunset, with a wake-time setting | Your wake time and red-by time |
| Pure red | Yes, with darkroom mode | Yes, the evening setting on computers |
| Backlight flicker | Not addressed | Flicker guard keeps the backlight at 100% |
| Settings | Many | Three modes, Warmth and Brightness |
| Support | Community forum | Email the people who make it |
Checked October 2026. Other apps change; check their own pages too.
What people ask.
Is Dimsome better than f.lux?
It depends on what you want. f.lux is free and has more settings. Dimsome adds a flicker guard, works on Android with the same key and schedule, and keeps things to three modes and two sliders.
Can I run f.lux and Dimsome together?
Not at the same time. Both change the screen colours, so use one or the other.
Tonight can look different.
Get your key, set two times, and let the evening come to your screen slowly.
Get Dimsome