Looking for emotion recognition ML KIT (Ml google kit)

Hello, dear community.
For a couple of months we are developing mobile application for standup artist and their watchers. One of the general features of our app is smile/laugh recognition, for our MVP was chosen ML Google kit (SDK). We tested it many hours, how it works, what is % of errors in it. After these tests and the results obtained, I began to search for a more perfect solution (from the available ones).
I will be very grateful to those who share information about possible technical solutions for this model.
For sure i am open for any questions, who are interested in Ml Googli kit and iam ready for share our experience on features of it.