In depth

A closer look at f.lux (preview, root-only)

f.lux removes the bright blue colors from your phone to help you wind down at night and returns your screen to normal the next day. This preview version is not a final release. It requires a rooted phone, and otherwise it will not do much. We appreciate your help with bug reports and feature questions.

Most rooted Lollipop and Marshmallow devices (5.x and 6.x) will work.
Some rooted itkat (4.x) devices will work, but many do not.

nown issues:
- Many Samsung Galaxy devices do not work
- Your screen will flash anytime an app is updated through Google Play

Also, if you want to uninstall, do one of these things:
- Disable f.lux before uninstalling
- Reboot after uninstalling

Requirements

Device requirements

Android 4.0.3+

Verdict

Should you install f.lux (preview, root-only)?

f.lux (preview, root-only) is an Android application available under the Freeware license — the APK is 3.7 MB. We’ve catalogued it under Health.

Verified clean. Every f.lux (preview, root-only) APK on SoftLookup is scanned for malware, spyware, and adware. We re-test on every update.

f.lux (preview, root-only) specifications

Category: Health
Publisher: justgetflux
Last updated: May 5, 2026
Requirements: Android 4.0.3+
License: Freeware
Operating system: Android
File size: 3.7 MB
Price: Free
Page views: 1611

f.lux (preview, root-only)22.0

See f.lux (preview, root-only) in action

A closer look at f.lux (preview, root-only)

Device requirements

Should you install f.lux (preview, root-only)?

f.lux (preview, root-only) specifications

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