I think just another way. Choose what is best for you. 
Lawnchair is a Launcher, that let you define shortcuts/gestures to call an app. Other launchers do that as well, of course.
I dont like “Hey Google” always on. So I prefere to start VoiceAdd on another way. This showcase is about “DoubleTip” 
Perhaps we could extend this thread:
How do you quickly add your items to dynalist?