Mileage tracker

Hello everyone, I am very new to SwiftUI and CWC and had a question. The question I have is this: I am thinking of redoing an App I built in Adalo and I wanted to add a feature for tracking miles as someone moves throughout a city. Is it better to store said miles in CloudKit or in SwiftData? Or maybe use a combination of both (storing data locally then updating the DB later.)
If anyone has another thoughts they are welcome.
Thank you
Jason D.