I remember that Beurer (https://www.beurer.com/web/de/produkte/active/sport-und-akti...) was once recommended because of offering a cloud-free tracker. It worked quite fine, but I eventually stopped using it. That was about five years ago, bear in mind.

I can only find a single tracker in their US store (https://www.shop-beurer.com/collections/active/products/beur...), but this is (an updated version of) the one I had.