How can I get the LED on an iPhone 6 to blink constantly? Sometimes I get caught walking my dog back home in the dark. When that happens, I'd liked to be able to hold my iPhone 6 up and let the LED blink so that I'll be more visible to traffic on our seldom-traveled road. I searched for apps to do this simple thing, but I came up empty. Surely there's a way to get the phone's LED to constantly blink, right?
I'm not sure what search criteria you're using, but there are countless flashlight/torch apps that offer this function. Usually they refer to an option in their settings for a Strobe effect - this flashes the LED.
I've just done a search on the iOS App Store using the term &quot;flash light&quot; and the first three hits offered flashlight apps with a strobe option:

Flashlight by Intellectual Flame Co., Ltd.
Flashlight by MobileTrends Inc.
iTorch Flashlight by Pixelinlove Ltd

NOTE: I have not personally used any of these apps, nor am I affiliated in any way with the developers.