How to start a service when dialer open

[Fazil TM]

I want to start a service while dialer open. The service may be just toasting a message etc. How it possible?

 

[LeoRex]

Tasker... that can do exactly that.

 

[NexusIsMasterRace]

IFTTT will let you set up if then logic for many services / api's on your phone.