What architectural approach would you prefer for developing a small software product?

For small iOS products, the MVVM (Model-View-ViewModel) or MVC (Model-View-Controller) architecture is often chosen.

MVVM helps separate presentation logic from business logic, which simplifies maintenance and testing. In simple applications, MVC can be faster to implement, but as complexity grows, MVVM provides better scalability.

Example of using MVVM:

class ViewModel {
    var data: Observable<String> = Observable("")

    func fetchData() {
        // load data and update data
    }
}

class ViewController: UIViewController {
    var viewModel = ViewModel()

    override func viewDidLoad() {
        super.viewDidLoad()
        viewModel.data.bind { [weak self] text in
            self?.label.text = text
        }
        viewModel.fetchData()
    }
}