Show HN: Winter swimming tracker that stores data in local storage

Having done winter swimming for 7 years now, I wanted a super simple tracker for my sessions. I don't want to create an account, sync between multiples services. All data is stored locally, and it's possible to export it and import back. When browser's location is received, it is sent to the backend which grabs weather data. However this request is not stored anywhere. The tool is niche, however if there are any cold swimmers I'd appreciate feedback.