🌟 Key Features & Functions
1. Completely Free Bluelight Protection
- No PC Glasses Needed: You don't need to spend money on blue light glasses or deal with the hassle of wearing them.
- Full Screen Protection: Effectively reduces blue light across the entire screen, similar to system night mode or dark mode.
- Covers Notifications, Lock Screen, & Navigation Bar: Extends filter coverage to every corner of your screen, including the status bar and navigation bar.
2. Natural Color Filters
- Maintains Readability: Uses natural warm colors, allowing you to comfortably read news, articles, and ebooks in a clear sepia tone.
- 7 Selectable Color Variations: Choose from 7 filter colors according to your preferences and environment, and fine-tune the brightness and opacity.
- Anti-Peeping Effect: By increasing the cut rate and dimming the screen, you can also prevent others from peeping at your screen.
3. "Auto Mode" Adapting to Ambient Light
- Automatic Brightness Adjustment: Automatically optimizes the blue light cut rate and screen brightness based on the surrounding light.
- Eye-Friendly Settings: Dim the screen automatically in dark rooms and set it to a highly visible brightness in bright outdoor environments.
4. "Timer Mode" Scheduled to Your Lifestyle
- Optimize for Daily Rhythms: Automatically switches the blue light filter ON/OFF or adjusts the reduction rate according to your custom schedule.
- Automatic Control: Easily automate settings, such as enabling the filter only during late-night hours.
5. Simple & Fast Operation
- One-Tap Adjustments: Simple design lets you launch the app and set your desired cut rate instantly.
- Convenient Shortcuts: Toggle and adjust settings anytime via the notification area, home screen widgets, or the Quick Settings panel.
6. Filter-Free "Screenshots"
- Clean Screenshots: Capturing screenshots while the filter is active yields clear, filter-free images.
- One-Tap Capture: Take screen captures directly from the notification area to quickly share or delete them.
7. Battery-Friendly Energy Saving
- Ultra-Lightweight Operation: Eliminates all unnecessary background operations. The app does not consume power unless you are adjusting filter settings.
- Longer Battery Life: Our lightweight design only adjusts screen color temperature, consuming significantly less battery than other blue light 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. |
💡 Frequently Asked Questions (FAQ)
Q. Why is the "Accessibility Service" permission required?
A. Due to Android system limitations, the Accessibility Service is required to lower screen brightness below the system's standard minimum and apply color filters to the entire screen, including the status bar and navigation bar. We do not collect or monitor any of your private data, so please grant the permission with confidence.
Q. Can I use this with other screen adjustment apps?
A. If you enable this app alongside other screen-dimming or privacy filter apps simultaneously, the screen may become extremely dark and unresponsive to touch. Please avoid co-using them and run this app alone.
Q. What is the difference between the Free and Paid versions?
A. The free version provides all basic blue light filtering features. The paid version (or in-app subscription) offers advanced customization, expanded notification controls, and removes all advertisements.
