🌟 Key Features & Functions
1. Broad Color Temperature Customization (1000K to 7000K)
- Reduce Blue Light: Lowering the color temperature (making it warmer) during the night or in dark places blocks harmful blue light. This relieves eye strain and supports better sleep quality.
- Support Concentration: Setting a higher color temperature (cooler tones) during the day, at work, or while studying stimulates the brain and helps maintain focus.
2. Adaptive "Auto Mode" & "Schedule Mode"
- Auto Mode: Automatically detects ambient brightness using device sensors and adjusts the color temperature dynamically in real-time.
- Schedule Mode: Automatically transitions the color temperature based on your schedule (e.g., "Shift to warm colors at 9:00 PM"), providing an eye-friendly screen environment tailored to your daily rhythm.
3. Fully Compatible with Status Bar & Navigation Bar
- Uniform Full-Screen Dimmability: Extends filters not just to standard app windows, but also to the notification area, lock screen, and navigation bar, completely unifying the color tones of your screen.
4. Filter-Free "Screenshots"
- Clean Screenshots: Capturing screenshots while color filters or temperature shifts are active yields clear, filter-free images for easy sharing and saving.
5. Simple Operation & Multiple Shortcuts
- One-Tap Adjustments: Quickly toggle the filter ON/OFF or adjust color temperature at any time via the notification area, home screen widgets, or the Quick Settings window.
6. Energy-Saving Design Minimizing Battery Drain
- Ultra-Lightweight Background: System architecture excludes unnecessary background processing, consuming significantly less battery than other screen filter apps.
🔧 Device-Specific Troubleshooting
On some Android devices, the OS's aggressive power-saving features or background restrictions may turn off or prevent the filter from launching. If you experience this, please try the following settings according to your device manufacturer:
📱 Samsung (Galaxy) Devices
- Symptom: App is put into deep sleep and terminated.
- Solution: Go to device Settings -> Apps -> Select this app -> Battery -> Set to "Unrestricted". Additionally, go to Settings -> Battery and Device Care -> Memory -> "Excluded Apps" and add this app to the list.
📱 Xiaomi (Redmi / POCO) Devices
- Symptom: Background launching or display over other apps is blocked.
- Solution:
- Go to device Settings -> Apps -> Manage Apps -> Select this app -> Other Permissions -> Set "Display pop-up windows while running in the background" to "Always allow".
- Set "Battery Saver" in the same app settings page to "No restrictions".
- Go to the task manager (Recent Apps), long-press this app, and click the Lock (Key Icon) to prevent auto-cleanup.
📱 OPPO (realme / OnePlus) Devices
- Symptom: App freezes or gets auto-cleared when moving to the background.
- Solution: Go to device Settings -> Apps -> Auto-launch -> Set this app to ON. Also, go to Settings -> Battery -> App Battery Management -> Select this app -> Enable "Allow background activity".
📱 SONY (Xperia) Devices
- Symptom: App gets terminated when running for long periods due to STAMINA mode.
- Solution: Go to device Settings -> Battery -> STAMINA Mode, and set this app to "Not restricted", or temporarily disable STAMINA mode.
📱 SHARP Devices
- Symptom: App is forced to close when the screen turns off due to "Eco-Technique" features.
- Solution: Set the device's Settings -> Energy Saving -> Eco-Technique Settings to "Normal Mode", or turn OFF "Energy Saving Standby" inside "Help Mode / Smart Mode".
📱 HUAWEI Devices
- Symptom: App is closed by battery management (Launch Management).
- Solution: Go to device Settings -> Battery -> App Launch -> Turn OFF automatic management for this app, and in the manual management pop-up, enable "Auto-launch", "Secondary launch", and "Run in background".
📱 ASUS (ZenFone / ROG Phone) Devices
- Symptom: Stopped by Mobile Manager memory cleanup.
- Solution: Open the "Mobile Manager" app -> Auto-start Manager -> Set this app to "Allow".
🔒 Safe & Secure Permissions
This app prioritizes your privacy and safety, only using the minimum required permissions.
| Required Permission | Purpose of Use |
|---|---|
| Display over other apps | Used to draw and display the screen color filter on the very front of the screen. |
| Accessibility Service | Used to appropriately adjust screen brightness and color temperature to reduce eye strain. (※ No personal data is collected or used for any other purpose) |
| Photos/Media/Files | Only used to save and manage screenshots that are taken without the filter showing. |
| Foreground Service | Used to maintain stable filter operation. |
| Network connections / Full access | Used for displaying ads in the free version and verifying paid licenses. |
| Run at startup | Used to automatically re-apply the filter when the smartphone is powered on. |
