ShakeJ Bluelight Filter

Try the 'ShakeJ blue light filter', which protects the eyes from the screen :)
"Blue-light" means the light's blue columns that exist in wavelengths between 380-500 nanometers. If a long time to see a blue light is decreased visual acuity and sleep inducing hormone secretion is reduced, also disturb sleep.
Easily block blue light!
- Blue Light reduction filter applied
 The decrease blue light filter is applied with just click
 
- Calibrate the screen to the desired color
 Use the Color Picker, you can mitigate the screen for the yellow liquid crystal (LCD urine)
 
- More than a dark screen brightness
 While lowering the brightness at night with a minimum can be darker
- After sunset, Before sunrise!
 it can automatically turn on after sunset, before sunrise :)
- Change Notification Style (Pro version)
Can change notification image, title and description :)
It was developed to use the battery efficiently. Using the filter does not use a lot of battery.
You can turn on and off more easily from the notification bar.
APK If you have downloaded and installed, and grant permission pop-up when the filter is applied to the button is not pressed.
 Because pop-up in the same layer as the filter. Please turn off a moment. I try search to troubleshooting.
Support android 6.0 mashmellow
Support Android smartphone and tablet
Discover all the features enjoyed free! :)