You gotta get the full-paid version of light flow to get extended apps support like whatsapp and go sms, it costs around 2$, but anyway its silly to pay for such thing!
Light Manager not working for me. I go to the area to test LED and nothing happens, even after turning off my screen.
EDIT: Weird. I rebooted the app and it still wouldn't show the LED when I hit Test. Made another test call (to check missed calls) and now it's working.