Create a Screen (UI is not important) which is having a count down timer from 30 mins. I can add a number of timers. If we close the app without stopping the timer, we need to save the timer in the async storage and restart it from the stopped interval.
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Screen will list active timers
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Click on button to add the timer
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The timer will start counting down from 30 mins
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Button on each timer to delete timer
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If app is closed and resumed the timer should show countdown from original start time. i.e. If i start a timer counting down 30 mins at 11:30 and than close the app. When i open the app again at 11:45 than it should show the timer at 15 mins and counting down.