There is no on-demand O2 reading on any fitbit. The best way to get this is with a fingertip pulse-ox meter like at a doctor's office. You can buy these at a drug store, or for much less at Amazon.
There is no on-demand O2 reading on any fitbit. The best way to get this is with a fingertip pulse-ox meter like at a doctor's office. You can buy these at a drug store, or for much less at Amazon.