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Apple Watch could gain an always-available low power mode in the forthcoming watchOS 9, which is also expected to expand on its existing health features.
According to Bloomberg, watchOS 9 will introduce a new low-power mode. Currently, Apple Watch can go into a Power Reserve mode if a user chooses, and will automatically go into it when the battery declines to 10%.
Power Reserve switches off all Apple Watch features except the time. However, Bloomberg claims that under watchOS 9, Low Power Mode will allow the Watch to continue running certain apps.
It's likely that the new mode will resemble the Low Power feature on iPhone, where amongst many other things, it reduces the screen brightness.
Reportedly, watchOS 9 may also extend the current health feature regarding atrial fibrillation. Although not certain for this release, when it does come, it will be used to monitor how often a person is in a state of atrial fibrillation over specific periods.
There won't be the long-awaited blood pressure monitoring feature. However, the new report also claims that Apple will add more workout types to the Apple Watch, as well as additional running metrics.
Apple's forthcoming watchOS 9 is also expected to see many of the current Watch faces refreshed in some way.