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.
Superhuman
Superhuman is an advanced email client designed to help high-growth teams and individuals reach Inbox Zero faster through a keyboard-driven interface, AI features, and lightning-fast performance.
Quick Comparison
| Feature | f.lux | Superhuman |
|---|---|---|
| Website | justgetflux.com | superhuman.com |
| Pricing Model | Free | Subscription |
| Starting Price | Free | $30/month |
| FREE Trial | ✘ No free trial | ✘ No 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 | 2014 |
| 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.
Superhuman
Superhuman is a premium email experience built for speed and efficiency. You can fly through your inbox using powerful keyboard shortcuts that eliminate the need for a mouse, saving you hours every week. The interface is intentionally minimal, removing distractions so you can focus on one conversation at a time. It works on top of your existing Gmail or Outlook account, so you don't need to change your email address to get started.
You can use built-in AI to draft high-quality replies, summarize long threads, and fix grammar instantly. The platform also includes integrated tools like read receipts, send later, and a built-in calendar to manage your schedule without leaving your inbox. It is designed specifically for professionals who handle high volumes of email and want to reclaim their time through a more intentional, faster workflow.
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.
Superhuman Features
- Keyboard Shortcuts. Perform every action from archiving to snoozing in milliseconds using intuitive keyboard commands without ever touching your mouse.
- Superhuman AI. Draft entire emails from brief phrases and summarize long conversations instantly to stay on top of busy threads.
- Split Inbox. Automatically categorize your incoming mail into custom streams so you can focus on important human conversations first.
- Read Receipts. See exactly when someone opens your email and which device they used so you can time your follow-ups perfectly.
- Built-in Calendar. View your schedule and send meeting invites directly within your inbox to avoid switching between different apps.
- Instant Undo Send. Recall an email immediately after hitting send to fix a typo or add a forgotten attachment before it reaches the recipient.
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
Superhuman Pricing
- Lightning-fast email experience
- Keyboard shortcuts
- Split Inbox and Snippets
- Read receipts and Send Later
- Basic AI features
- Mobile and Desktop apps
- Everything in Starter, plus:
- Shared snippets for teams
- Team-wide reporting
- Consolidated billing
- Priority support
- Administrative controls
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
Superhuman
Pros
- Unmatched speed for processing large volumes of email
- Excellent keyboard shortcuts reduce repetitive strain
- Clean and beautiful interface minimizes distractions
- Highly responsive customer support and onboarding
- Effective AI tools for drafting and summarizing
Cons
- Premium price point compared to free clients
- Requires time to learn all keyboard shortcuts
- No forever-free plan available for casual users
- Limited to Gmail and Outlook accounts only