To publish an app on the Apple App Store is a process that will take some work if you are new to it. Set aside at least a couple of days to go through the submission process.
It is recommended to start out by reviewing Apple's distribution guide.
The web is full of information and help for how to submit apps to the App Store. One example is this thread at the Ionic forum.
To help you prepare your Evothings app for publication, we will add more information to this page. Stay tuned!
You are also welcome to ask for help at the Evothings Forum.