Samukunai ('Are You Cold?') is a weather app that personalizes its morning notification to your cold tolerance, not the average person's. Give it 10 feedback taps — just rating how you actually felt — and the push shifts from a raw temperature to 'on the cold side for you,' using 75/25 percentile statistics, no ML. Fair warning: until 10 feedbacks it's just a plain weather app, no widget yet, iOS 26+ only. Free, no ads.

https://apps.apple.com/jp/app/id6762537476