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f.lux vs Rectangle

Professional comparison and analysis to help you choose the right software solution for your needs.

f.lux icon
f.lux
Rectangle icon
Rectangle

f.lux vs Rectangle: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature f.lux Rectangle
Sugggest Score — —
Category Os & Utilities Os & Utilities
Pricing Free Free

Product Overview

f.lux
f.lux

Description: f.lux is a free app that adjusts a computer's display color temperature based on the time of day, making screens appear warmer at night to reduce eye strain and disrupt sleep cycles less.

Type: software

Pricing: Free

Rectangle
Rectangle

Description: Rectangle is an open-source window management app for macOS that allows you to easily snap windows to different parts of the screen. It helps organize your workspace and boost productivity.

Type: software

Pricing: Free

Key Features Comparison

f.lux
f.lux Features
  • Adjusts screen color temperature based on time of day
  • Makes screen appear warmer at night
  • Can be scheduled to change color temperature automatically
  • Has options to customize color temperature
  • Works across Windows, Mac, Linux, iOS and Android
Rectangle
Rectangle Features
  • Window snapping
  • Keyboard shortcuts
  • Multiple display support
  • Customizable shortcuts and behaviors
  • Light and dark themes

Pros & Cons Analysis

f.lux
f.lux
Pros
  • Reduces eye strain from blue light at night
  • Helps maintain natural sleep cycles
  • Easy to install and use
  • Completely free with no ads or upsells
Cons
  • May take some time to get used to color changes
  • Limited customization options
  • Requires manual adjustments for daytime use
Rectangle
Rectangle
Pros
  • Easy to use
  • Increases productivity
  • Open source
  • Free
Cons
  • Limited to macOS
  • Fewer features than paid alternatives

Pricing Comparison

f.lux
f.lux
  • Free
Rectangle
Rectangle
  • Free

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Learn More About Each Product

f.lux
f.lux
Reviews, pricing & alternatives →
Rectangle
Rectangle
Reviews, pricing & alternatives →

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