Flashlight is currently the best free apps on the market.

INTRODUCTION TO THE FLASH WHEN HAVE INCOMING TELEPHONE CALLS:
★ The flash reports when the phone receives incoming telephone calls messages notifications.
★ Help you don't miss any call message notification.

FEATURE:
✔ Setting the flash when the phone is in vibrate silent or normal mode.
✔ Customize flash speed flash frequency fast or slow.
✔ The flashlight can be turned on the flash frequency can be adjusted.
✔ The handy toolbar can quickly turn on the functions without opening the app.
✔ Intelligent flash function turn off the flash when the user is using.
✔ The flash can be set for another applications software on your phone.
✔The flash is turned off automaticlly when the battery is low the flash can be customized bright or off depend on the battery help the phone saves more battery capacity.
✔ You can turn on or off the flash mode for calls text messages in the time frame you want.

Ghi chú: Cách khắc phục trên một số hãng điện thoại không nháy như OPPO VIVO ... :
Bạn vào ứng dụng -> tắt thanh thông báo -> mở thanh thông báo -> cho phép ứng dụng truy cập vào thông báo là được bạn nhé

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