Before using this Application, you need to use "adb tools" to grant permission, copy below command and exec it on a PC.
adb shell pm grant com.fei_ke.greyscale android.permission.WRITE_SECURE_SETTINGS
About "adb tools": https://www.xda-developers.com/install-adb-windows-macos-linux/
Source code: https://github.com/fei-ke/Greyscale
Latest Version
1.2Uploaded by
Ahmad Hosariy
Requires Android
Android 5.0+
Category
Free Tools AppContent Rating
Everyone
Security Report
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Flag as inappropriateLast updated on Jul 7, 2018
Fixed FC on some device.
