As a 14-year Fitbit daily user, I toyed with just using my Apple Watch (I've had it for two years and wear both) rather than trade up from a Charge 2 to a Charge 6. I tried hard to "do my homework" to see what, if anything, I'd be giving up from the Charge 2 (or the Apple Watch if I wear only the Fitbit), but somehow missed this about the missing altimeter. For those of us who live in the West at altitude, this is an important feature, and likewise (at least on the Apple) is an important part of the algorithm for analyzing calorie burns and intensity of walks/runs. So, had I known the Charge 6 was no longer incorporating an altimeter function, I'm not sure I would have purchased. But, after agonizing a bit, I have migrated my Fitbit account and data to Google, as I did not want to lose my 14 years of data. But, those who likewise want to have altimeter-driven data for hiking or routine walking/running workouts at 5200 or higher feet above sea level, this may be something you need to take into account. Honestly, now that Google has indicated no interest in smart watches, I'm not sure this will matter to them, but fitness trackers likewise should include an altimeter. Past correspondence with Fitbit (years past) usually was met with at least a polite acknowledgement of similar issues, but I suspect I will only waste my time trying to contact anyone at Google. Still, I will try.
