Consider BasicTip to be my 'Hello, World!' to software development on Apple's platforms! My goal was to develop a simple application that supported multiple platforms, match the look and feel of the native device applications, and utilize some of the new frameworks that Apple has recently provided. Under the hood, the application uses SwiftUI 2.0 (hence the stricter OS requirements for download), which I found to be a perfect fit for this application. Feel free to check out its implementation, as it is open source and hosted on Github!
BasicTip is, and will always be, free and ad-free on the Apple App Store.