🌟 Key Features & Functions
1. Priority on Performance & Stability
- Ultra-Lightweight Design: Eliminates all unnecessary background communication and processing. Operates extremely fast and consumes minimal RAM.
- High Compatibility: Highly resistant to interruptions from the OS or other apps, ensuring stable performance on older or low-spec devices.
2. Natural Color Filters
- Readable Sepia Tone: Rather than simply darkening the screen, the filter applies natural warm colors like sepia to block blue light, ensuring news articles and emails remain perfectly readable.
- 7 Filter Colors: Choose from 7 filter colors according to your environment and preferences, and intuitively adjust the opacity (cut rate) using a slider.
3. Simple & Easy Operation
- One-Tap ON/OFF: Simple design lets you start the filter by just launching the app and tapping a button. No complicated settings required.
- Boot-Up Auto-Launch: Option to automatically apply the blue light filter when your device starts up.
4. Filter-Free "Screenshots"
- Accurate Screen Capture: Capturing screenshots with the filter active automatically prevents filter colors from showing, saving the original clean screen image.
5. Drastically Reduced Battery Consumption
- Only Color Temperature Adjustments: Avoids redundant CPU processing and only adjusts the display color temperature, ensuring practically zero impact on battery life.
🔧 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. |
