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f.lux vs LimeSurvey

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

f.lux icon
f.lux
LimeSurvey icon
LimeSurvey

f.lux vs LimeSurvey: 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.

LimeSurvey: LimeSurvey is an open source online survey tool for building and publishing online surveys. It allows users to create simple to advanced surveys, add logic like branching, distribute via links, and analyze response data.

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 LimeSurvey
Sugggest Score — —
Category Os & Utilities Online Services
Pricing Free Open Source

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

LimeSurvey
LimeSurvey

Description: LimeSurvey is an open source online survey tool for building and publishing online surveys. It allows users to create simple to advanced surveys, add logic like branching, distribute via links, and analyze response data.

Type: software

Pricing: Open Source

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
LimeSurvey
LimeSurvey Features
  • Questionnaire building with drag & drop interface
  • Support for different question types like single-choice, multiple-choice, arrays, matrices, etc
  • Skip logic and branching
  • Multiple language support
  • Customizable themes
  • Data export in multiple formats like CSV, Excel, SPSS, etc
  • Statistics and graphs for data analysis
  • Access control and permissions
  • Email notifications and reminders

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
LimeSurvey
LimeSurvey

Pros

  • Free and open source
  • Powerful and flexible survey building
  • Good documentation and active community support
  • Self-hosted - data stays with you
  • Feature-rich even in free version

Cons

  • Steep learning curve
  • Setting up and managing surveys requires technical skills
  • Limited free version lacks some advanced features
  • No native mobile app

Pricing Comparison

f.lux
f.lux
  • Free
LimeSurvey
LimeSurvey
  • Open Source

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Learn More About Each Product

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

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