How To Make Own App To Control Relay With Button (ESP8266)

Hello greeting everyone, I am a new user here. I want to ask how can I make my own android application to control the relay with the button on my ESP8266. Please don’t direct me to this link https://github.com/myDevicesIoT/Cayenne-API-Sample-App.
thanks in advance

you can use Mit app inventor Cayenne API tutorial for beginners beginners with ai2/thunkable but need to change certain things from this topic Cayenne API tutorial for beginners beginners with ai2/thunkable