f.lux
f.lux is a cross-platform computer program that adjusts your display's color temperature according to location and time of day to reduce eye strain and improve sleep quality.
Sudowrite
Sudowrite is an AI-powered writing assistant designed specifically for fiction authors to help brainstorm plots, expand descriptions, and overcome writer's block through collaborative storytelling tools.
Quick Comparison
| Feature | f.lux | Sudowrite |
|---|---|---|
| Website | justgetflux.com | sudowrite.com |
| Pricing Model | Free | Subscription |
| Starting Price | Free | $19/month |
| FREE Trial | ✘ No free trial | ✓ 0 days free trial |
| Free Plan | ✓ Has free plan | ✘ No free plan |
| Product Demo | ✘ No product demo | ✓ Request demo here |
| Deployment | ||
| Integrations | ||
| Target Users | ||
| Target Industries | ||
| Customer Count | 0 | 0 |
| Founded Year | 2009 | 2020 |
| Headquarters | Los Angeles, USA | San Francisco, USA |
Overview
f.lux
f.lux is a display management tool designed to align your screen's brightness and color with your internal biological clock. During the day, your screens look like sunlight, but as the sun sets, the software automatically transitions your display to a warmer, amber hue. This shift mimics indoor lighting and reduces the blue light exposure that often interferes with your sleep patterns and causes digital eye strain.
You can customize the experience by telling the software exactly what kind of lighting you have and where you live. It then handles the transitions automatically, so you never have to manually adjust your monitor settings as evening approaches. It is a set-it-and-forget-it solution for anyone who spends long hours in front of a computer, especially during late-night sessions.
Sudowrite
Sudowrite is your dedicated AI partner for fiction writing, designed to act as a collaborative co-author rather than a simple text generator. You can use it to break through writer's block by generating plot points, sensory descriptions, and character beats that match your unique style. Whether you are drafting a novel from scratch or polishing a finished manuscript, the platform provides tools to expand short sentences into vivid scenes or rewrite existing paragraphs to change the tone and pacing.
You can manage your entire storytelling process within a clean, distraction-free interface that organizes your chapters and story bibles. It solves the common problem of the 'blank page' by offering creative suggestions that you can accept, reject, or tweak. The software is built for novelists, screenwriters, and hobbyist storytellers who want to speed up their drafting process while maintaining full creative control over their narrative arc.
Overview
f.lux Features
- Adaptive Color Tones Automatically transition your screen from cool daylight tones to warm indoor colors as the sun sets in your specific location.
- Location-Based Timing Enter your coordinates or zip code so the software can precisely calculate sunrise and sunset times for your exact area.
- Custom Color Profiles Choose from various presets like 'Reduce Eyestrain' or 'Classic f.lux' to find the exact warmth level that feels best for you.
- Movie Mode Preserve colors and shadow detail while watching films with a specialized setting that maintains a balanced look for media.
- Darkroom Mode Turn your entire screen red and black to preserve your night vision and eliminate blue light entirely in dark environments.
- Smart Lighting Control Connect your smart home bulbs to the software to synchronize your entire room's lighting with your computer screen's color.
Sudowrite Features
- Story Engine. Generate thousands of words in your specific voice by feeding the AI your chapter outlines and character notes.
- Describe Tool. Highlight any word or phrase to generate vivid sensory details involving sight, sound, smell, touch, and taste.
- Rewrite Feature. Transform your existing sentences by asking the AI to make them more descriptive, faster-paced, or more intense.
- Brainstorming Mode. Generate endless ideas for character names, plot twists, world-building elements, and dialogue options when you feel stuck.
- Story Bible. Keep your story's facts consistent by storing character traits, locations, and world rules in a centralized digital brain.
- Canvas Tool. Visualize your story structure on a digital whiteboard to map out plot points and character arcs before writing.
Pricing Comparison
f.lux Pricing
- Full automated color shifting
- Location-based transitions
- Customizable color presets
- Movie and Darkroom modes
- Smart bulb integration
- Everything in Personal, plus:
- Legal use for organizations
- Support for the developers
- One-time payment options
- Volume licensing available
Sudowrite Pricing
- 30,000 AI credits per month
- Access to Story Engine
- Unlimited Brainstorming
- Visual Canvas tool
- Chrome Extension access
- Everything in Hobbyist, plus:
- 90,000 AI credits per month
- Rollover credits (up to 12 months)
- Priority support access
- Advanced AI model options
Pros & Cons
f.lux
Pros
- Completely free for personal use
- Extremely lightweight on system resources
- Significant reduction in late-night eye strain
- Set-it-and-forget-it automation works reliably
Cons
- Can interfere with color-accurate design work
- Occasional flickering during transition periods
- Interface feels slightly dated compared to modern apps
Sudowrite
Pros
- Excellent at mimicking a writer's specific prose style
- Sensory description tool adds depth to flat scenes
- Intuitive interface designed specifically for long-form fiction
- Regular updates and active community for feature requests
Cons
- Credit system can be confusing for new users
- Requires manual fact-checking for plot consistency
- Higher tiers are expensive for casual hobbyists