Disable led notification and change sound volume..

hi
new with mx4,
the led is blinking too much - can i decide which apps turn th eled on for notification?
i want just the sms/whatsapp app turns to led on,
another question-
i want higer volume for sms and lower for the ring , how can i change it?
tnx

You could something like light flow from the play store.

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