Scanwatch seems to be a decent option, by withings. https://www.withings.com/de/en/scanwatch https://www.withings.com/de/en/scanwatch It's a french company so

Scanwatch seems to be a decent option, by withings. https://www.withings.com/de/en/scanwatch https://www.withings.com/de/en/scanwatch It's a french company so bound by GDPR, which means they should have decent privacy options.