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note: One of my subs pointed out that the original implementation of this application had a infinite loop in it. While this loop is not problematic; it still isn't a great practice. On this sub's advice, I also added a version of this code which uses streams to fetch the data from the shared prefs key/value store. There is both a basic dart example and an RxDart example; just make sure to import RxDart if you want to look at that one. Many thanks to manideep polireddi.