I don't think it's absurd to forego all this fancy crap that triggers through walls, and instead have a cute, local-to-device, privacy respecting app for loggin

I don't think it's absurd to forego all this fancy crap that triggers through walls, and instead have a cute, local-to-device, privacy respecting app for logging contacts and locations. Brought your mom some bread today? Log it in the app. Went to a grocery store after? Log it in the app. Every Sunday or something maybe check in with some of the people you got within physical proximity of, and try to investigate a bit if there were any known cases at your grocery store or such. If you were potentially in contact with Covid, maybe update the people you saw after it, or maybe just self isolate, or maybe both. Definitely do get in contact if you have symptoms, and ideally you could even alert the grocery store and they could post a notice somewhere people could easily find (ideally online) with when you visited and perhaps the likelihood of you having had it at that point. Sanitize your groceries too~ People pick things up and put them back, I imagine there are hundreds of cans and junk food wrappers sitting in stores across america right now with Covid on them. I really believe this is all doable with the stock iOS Reminders app and some discipline. But a standalone app would be nice; not-plaintext-in-the-cloud is kind of important at scale. Non-iCloud reminder lists were possible at one point. (Tangent but Reminders a misnomer imo, I vote renaming it to String Nest)