Are you tired of straining your eyes when reading on your mobile device? Do you find the default font size too small or too large for your liking? Look no further than "Bigfont - change font size," the ultimate solution to tailor your mobile experience to your preferences.

Key Features:
- Change font size: Big font can help you change system font size from 50 to 320% easy to read on your device
- Night mode: Big font app provide blue light filter function to protect your eyes
- Customized the font size scale value
Permission
- WRITE_SETTINGS: change the system font size
-ACTION_MANAGE_OVERLAY_PERMISSION: make blue light filter