Twilight

Twilight – Your Nighttime Screen Filter for Healthier Sleep

The science-backed filter that adapts your display to your circadian rhythm, reducing blue light exposure before bed.

Twilight is a precision screen filter application designed to minimize the disruptive effects of blue light on your natural sleep cycle. While the exact mechanisms of blue light's impact on melatonin production are still being studied, the core principle is clear: reducing short-wavelength light in the evening can help your body prepare for rest. Twilight implements this by applying a warm, color-temperature filter over your entire screen, shifting the display's spectrum from cool blue tones to warmer amber and red shades as the sun sets.

Key capabilities and configuration options:

• Color Temperature & Intensity Control: You can precisely adjust the warmth of the filter (from a subtle 2500K to a deep, reddish 1200K) and the overall intensity of the effect (from 0% to 100%). This gives you complete control over how orange or red your screen becomes at night.
• Automatic Sunset Detection: The app uses your device's location to determine sunrise and sunset times. It then automatically activates the filter at dusk and deactivates it at dawn, creating a smooth, gradual transition that mimics natural lighting changes.
• Custom Schedules & Manual Override: You can set a fixed schedule (e.g., 9:00 PM to 6:00 AM) or a custom time range. A manual toggle allows you to instantly turn the filter on or off, regardless of the schedule.
• System Integration & Performance Modes: Advanced settings let you configure the app to auto-start after device reboot, choose whether the filter affects the notification shade and system UI, and enable GPU-rendering for smoother transitions (note: this may increase battery drain).
• Turbo (Ad-Free) Upgrade: The free version is supported by ads. The Turbo upgrade removes all advertisements and unlocks additional features, including extended color temperature ranges, finer intensity control, and priority customer support.

Detailed feature breakdown:

• Adjustable color temperature from 1200K (deep red) to 6500K (neutral white).
• Manual intensity slider from 0% to 100% for fine-tuning filter strength.
• Automatic sunset-based activation using GPS or network location.
• Custom fixed schedule with optional manual override toggle.
• GPU-rendering option for smoother, more power-efficient transitions (may increase battery usage).

Download Twilight now – Your sleep deserves this upgrade

Limited-time offer: Get the Turbo upgrade free for the first 7 days. Activate your exclusive access today and experience uninterrupted, ad-free blue light filtering. This offer is only available for a short period – don't miss out on transforming your screen into a sleep-friendly tool.

Technical Disclaimer: This app requires an active internet connection for location-based features and ad delivery (free version). In-app purchases are available for the Turbo upgrade, which removes ads and unlocks premium features. The app's effectiveness in improving sleep quality may vary based on individual physiology and usage patterns.