Disable Heart Rate and Blood Oxygen Tracking
One of the biggest reasons to have an iPhone is how easily you can keep track of your heart rate during the day.
However, on older Apple Watches, this feature — along with Blood Oxygen Tracking — can take a toll on your battery life. If you need your Apple Watch’s battery to last longer, you might want to disable these features, even temporarily.
- Open the Watch app on your iPhone.
- Go to Privacy.
- Diable Heart Rate and Blood Oxygen Measurements.
You can also disable any other feature that’s available. When you need them again, you can repeat the same steps and enable them.