What I did?
I embedded api.ai bot in an app made with thunkable/any app made with any appinventor platform.
Using webviewer component
1.Go to api.ai and create new bot.
2.Go to integration.
3.And connect to web demo.
4.You can see like this
5.Copy it and create an html file upload it to assets and load in webviewer or webview dialog extension.
Assistant.apk (2.3 MB)