Has anyone heard of the Ava Bracelet for cycle tracking? Charting never worked for me because I usually wake to pee in the early mornings and don't consistently wake at the same time, so I didn't have a good time to reliably temp. But this bracelet essentially automatically monitors your temp (and other things) and syncs with an app to predict ovulation. My husband and I are done having kids but because of some health issues he's having, we've had to delay his vasectomy. We're using condoms for now, but it would be nice to use this to know for sure what days we need to be extra careful. If it was $100 I would have pulled the trigger, but $199 is a little steep for something so new to the market. What do you think?