Blue Light Filter(+Screenshot)

This app is an accessibility app designed to help reduce visual discomfort and difficulty seeing the screen caused by screen light stimulation, such as photophobia or light sensitivity.
It uses Accessibility Services to overlay a filter across the entire screen, including system areas and notification areas, allowing users to customize the display to suit their needs.

You can adjust the filter to suit your visual needs and usage environment, allowing you to use your smartphone more comfortably.


Who This App Is For
1. People with photophobia (sensitivity to bright light)
2. People with light sensitivity
3. Those looking to reduce fatigue or discomfort caused by screen light
4. Older adults or anyone sensitive to screen glare
5. Users who want to customize filter color and opacity for comfortable viewing
(Since color perception varies from person to person, users with color vision differences can adjust the filter color to suit their vision and usage environment.)
* This app is not a medical device.
Also, it is an accessibility tool designed to adjust the screen for easier viewing, not for treating visual conditions or improving symptoms.


Before Use
Visual perception varies from person to person.
This app allows you to adjust the filter color and intensity to suit your device and usage environment.
This app supports everyday smartphone use by allowing you to customize the screen display to suit your individual needs.


Key Accessibility Features
1. Full-Screen Filter Display
It displays a filter over the entire screen, including system areas and notification areas, to help reduce light stimulation.

2. Filter Color and Opacity Adjustment
You can adjust the filter color and intensity to suit your visual needs.

3. Schedule Feature
You can automatically enable or disable the filter during specified time periods.

4. Quick Operation
You can quickly toggle the filter on or off from the notification bar or a shortcut.

5. Screenshot Feature
You can take screenshots with the filter applied using the Accessibility Service.
You can take screenshots with the filter temporarily disabled, depending on your settings.
You can take screenshots excluding the status bar, navigation bar, and display cutout, depending on your settings.

6. Accidental Touch Prevention
You can set areas to help prevent accidental touches near the edges of the screen.
You can customize the color, opacity, and width of these areas.


Use of AccessibilityService API
This app uses AccessibilityService to support people with photophobia or light sensitivity.

Purpose of Use
The AccessibilityService API is used solely for the following accessibility features:
1. To display a filter across the entire screen, including system areas and notification areas, to help reduce light stimulation from the screen.
2. To take screenshots.
3. To help prevent accidental touches near the edges of the screen, including system areas and notification areas.
The AccessibilityService API is not used for any other purpose.

Privacy and Data Collection
This app does **NOT** collect, transmit, or store personal information, on-screen content, user input, passwords, or other sensitive information through the AccessibilityService API.
The AccessibilityService API is used solely for the accessibility features described above.
The AccessibilityService API is enabled only with the user's explicit consent and can be disabled at any time through the app or the device's system settings.


Network Communication Permission
Network access is used only to display advertisements.


The Advertising ID is used only to display advertisements.
Privacy Policy
https://markn.cloudfree.jp/AndroidApp/privacy

Recent changes:
Ver.2.9
You can now set the language for each app from the Settings app.

Ver.2.8
Support for Android17.

Ver.2.6
Fixed scrollbar positioning in RTL layouts like Arabic.

Ver.2.5
Added support for the corner blocks.

Ver.2.2
Fixed an issue that caused the app to crash when rotating the screen on certain devices.

Ver.2.0
Added support for monochrome app launcher icons.