My English not good
I have a custom app of hass for mobile.
Link: https://github.com/keitetran/ha-cunkute-client
Excample json file : https://raw.githubusercontent.com/keitetran/Alexa-NodeMCU-V1.0/master/config.json
UI link: https://myhomeiot-184105.firebaseapp.com/
Edit your json file. That will render a new mobile app