Iris

Iris provides a blue‑light filter and screen‑dimming functionality aimed at reducing eye strain and supporting healthier sleep patterns. It adjusts the color temperature of the display to lower the amount of blue light emitted and can lower brightness without using pulse‑width modulation, which helps avoid flicker that may cause discomfort. The software operates automatically by detecting day or night conditions, but also offers a control panel where users can select preset modes, customize settings, or apply partial‑screen overlays for targeted reduction.

The program is available for macOS, Windows, and Linux, and includes a lightweight “Iris mini” variant that uses less CPU resources. It claims compatibility with docking stations and USB‑connected monitors through a custom high‑level color API, and it supports additional features such as manual color effects, font rendering adjustments, and screen magnification. Both the standard and mini versions are free, with optional paid Pro editions that add further capabilities.

Iris targets individuals who spend extended periods in front of screens and want to mitigate visual fatigue, improve nighttime comfort, and maintain visual health while working or using digital devices. Its emphasis on extensive blue‑light reduction range and PWM‑free brightness control distinguishes it from other basic color‑temperature tools.