Anyone tried calibre bio for measuring breath

People have been getting them - perhaps post on this thread: Calibre Biometric Spirometer Product Launch - #80 by cl-user

I have had one since the beginning. They have had some startup pains but they seem to be a very honest company doing their best. (For example, they shipped everyone a brand new device when they found out there were flaws in the original.) It is very comfortable and easy to wear. The Android app is usable but has some bugs. The Iphone App seems to be better supported. I can’t vouch for whether or not the device is accurate, but the numbers seem to be reasonable.

A couple of things that are interesting to see are to see is how much the calorie burn calculations differ from what is estimated from my Garmin watch. Another thing that’s interesting to see that when I do cardio, I start out burning mostly fat, but by the end, I’m burning all carbs. If you have any questions about it, I’ll try to answer them.

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