OnePlus 9 - Stopwatch; Zen Mode

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 Label: An alarm note will be displayed on the
screen when it rings.
 Delete alarm: Long press the alarm you want
to delete and tap “Delete”.
World clock
 Add region: Tap the globe icon at the
bottom of the screen to check and select the
cities from the list.
 Comparison time: Drag the dot on the dial
to see the time of the city you added.
 Weather: The weather will be showed when
you tap on the city name.
Timer
 Add countdown: After entering the minutes
and seconds, press the start button to start
the countdown.
After starting a countdown, you can select the
button in the lower right corner to add
another countdown.
 Delete countdown: Tap to delete a specific
countdown time.
 Pause: Tap to pause a countdown.
 Label: Tap “Add Label” to input whatever you
want to rename it.