Hongmed H30 2020 Smart Watch Fitness Tracker with Blood Oxygen Pressure Monitor for Android and iPho worth to buy? Thanks for it if those of you who have purchased Hongmed H30 2020 Smart Watch Fitness Tracker with Blood Oxygen Pressure Monitor for Android and iPho could share about what you think of the product. I would love any extra info, as it is quite pricey as $39.99 and I just want to know it is good before paying for it.