If you absolutely cannot pay $20, do not risk your security. Use one of these completely free alternatives that offer similar functionality:
| Software | Platform | Key Features | License Type | | :--- | :--- | :--- | :--- | | f.lux | Win, Mac, Linux, iOS | Automatic color temperature adjustment based on sunrise/sunset. No dimmer feature. | Freeware (Donation) | | LightBulb | Windows (Open Source) | Gamma-based blue light reduction. Works with multiple monitors. Very lightweight. | GPL v3 (Free) | | Redshift | Linux, Windows | Adjusts color temperature. No GUI by default (command line). | GPL v3 (Free) | | Windows Night Light | Windows 10/11 (Built-in) | Basic blue light filter. Found in Settings > Display. Less customizable but safe. | Built-in OS |
Recommendation: Try LightBulb (GitHub) if you want a manual dimmer. Use f.lux for automatic circadian rhythm matching. Neither requires a "license code." Careueyes Free License Code
Before diving into licensing, let’s clarify what you are getting. Careueyes is a Windows-based utility (also available for iOS and Android) that goes beyond simple "night mode." Its core features include:
Pricing Model: Careueyes is not freeware. It offers a 30-day fully functional trial. After that, a single-user license costs approximately $19.95 USD (lifetime updates). This is reasonable, yet many users still search for a "free license code." If you absolutely cannot pay $20, do not risk your security
If you are a student, teacher, or non-profit worker, email support@careueyes.com. Explain your situation. Some developers (though not guaranteed) provide free or discounted licenses to educators or open-source contributors.
This is the only official "free license." You get full premium access for 30 days with no credit card required. After 30 days, the software enters a limited "nagware" mode (it still filters blue light but disables features like custom intervals and presets). Pricing Model: Careueyes is not freeware
Cybersecurity firms report that over 70% of "cracked software" contains hidden malware. A fake Careueyes keygen could install:
If you decide to purchase, here is the safe workflow:
Warning: Never run a "patch.exe" or "keygen.exe" downloaded from YouTube descriptions. These are almost always Trojans.
Cracked software often crashes, conflicts with Windows updates, or disables core features (like the wake-up timer). Users report that cracked Careueyes versions often stop working after a Windows 10/11 update.