this is a fully working flutter in full book example. You see you can go to this app to see that this is proof that our app works at least here. Now, if your app is broken, take this version and compare with a compare tool like notepad++ or visual studio, what the edits are, and undo each one of the bad until all the "red" is gone, and all the "green" is here. "Blue?" It's next, it means in a blue/green test, the green passes, and the blue is the delta. What is delta? The changes. So, you see this example, fully functional flutter in full boilerplate code is worth comparing to yours. It does not have persistence. The book is on amazon, ok? You can buy it for 99 cents, this app is free. Have an idea to improve it? Work with us, on fiverr, whatever it takes to get your app published on the store, like this. Why? You can trust my publishing, because here, look, this app is on the store already. Why couldn't i do your app for money? I take USD via paypal. Bitcoin, whatever, etherium, whatever. Price, it's whatever. 5 bucks, sure. It's good. Let's get to work publishing your ideas to life.