Hello dear. i hope you are doing well.
I'm Ali, a software engineer and IOS developer.
i see that you want a demo app to teach students on it?
i have deep experience in APIs and Firebase services. i can finish your demo app in one day.
just send me what services should be in this demo app and i will make it. and if you have nothing on your mind, i can make you a demo app with too many services.
Thanks for your time, and waiting to hear form