How to use Blloc assistant app

Hi I am using pro version of Ratio, thank you so much for Blloc Dev’s for bringing this and it is really pleasing experience to use on Poco F1, by default assistant app changed to this from Google assistant app, but don’t know how to use it , please guide me… thank you.

Blloc assistant is not as Google assistant. It is used to activate the grayscale within the app by using the Google assistant gesture.