Blue light Filter for old android phones is an application that enables older android phones or versions that do not have the option enabled by default in their system.
Blue light Filter for old android phones is is a tiny ad-free utility to reduce and control blue light emitted by your devices.

✓ Multiple filters with different tints
✓ Edit/add filter colors to suite your mood
✓save,create or choose from multiple profiles
✓ Full range of opacity levels to dim the screen
✓ Timer present
✓ Easily toggle on and off from status bar
✓ Ad-free (no ads) & no special permissions