Not sure if many people are aware, but there are some fitness trackers that you can use FSA/HSA funds to purchase. Now is high spending time at the end of the year, so wanted to pass along. I recently bought an Oura ring, about $450USD and it was covered by my HSA. I like it so far, and it seems that there’s a way to integrate the Dexcom app, although I haven’t tried it yet. I’m mostly using for activity and sleep tracking. fsastore.com is a good website to find ones that are eligible (sadly the fancy Garmin and Apple Watches are not). Hope this helps!
ETA: This is a US thing, should have clarified!