How to store multiple lists

I’m a beginner to Flutter. I am trying to make an app in which the user can make multiple ordered lists that are however long they want (probably <30 strings). The lists need names. Could you suggest how to store the lists. I was thinking about a database or saving a list made up of lists. What method would you recommend. Thank you.

You should explain a bit more what the app should do with this lists. If it’s just to load and store you can just save them as simple json files.

I want users to be able to make lists of people that they rank by ability, then choose a few of them to make into badminton fixtures.

And this should interact with apps of other users or just work inside the app?

It should just interact with one app. All local - no sharing

Then you could just save your lists in a json file and load it again at startup.

Thank you. I’ll try that.