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f.lux vs LibreOffice - Calc

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

f.lux icon
f.lux
LibreOffice - Calc icon
LibreOffice - Calc

f.lux vs LibreOffice - Calc: The Verdict

⚡ Summary:

f.lux: 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.

LibreOffice - Calc: LibreOffice Calc, your open-source solution for powerful spreadsheet management. Create, analyze, and share data with ease. Enjoy a free and feature-rich alternative to proprietary spreadsheet software.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature f.lux LibreOffice - Calc
Sugggest Score — —
Category Os & Utilities Office & Productivity
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

LibreOffice - Calc
LibreOffice - Calc

Description: LibreOffice Calc, your open-source solution for powerful spreadsheet management. Create, analyze, and share data with ease. Enjoy a free and feature-rich alternative to proprietary spreadsheet software.

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
LibreOffice - Calc
LibreOffice - Calc Features
  • Spreadsheets
  • Formulas
  • Charts/Graphs
  • Pivot Tables
  • Data Analysis
  • Import/Export
  • Macros

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
LibreOffice - Calc
LibreOffice - Calc

Pros

  • Free and open source
  • Compatible with Microsoft Excel files
  • Good for basic to intermediate use
  • Available on Windows, Mac and Linux

Cons

  • Lacks some advanced features of Excel
  • Limited chart types
  • Not as widely used as Excel

Pricing Comparison

f.lux
f.lux
  • Free
LibreOffice - Calc
LibreOffice - Calc
  • free

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Learn More About Each Product

f.lux
f.lux
Reviews, pricing & alternatives →
LibreOffice - Calc
LibreOffice - Calc
Reviews, pricing & alternatives →

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