local notifications2 app source code1 app store1 authentication1 battery app1 battery level1 battery monitor1 bill reminder1 charging app1 charging dashboard1 countdown1 customization1 dark ui1 firebase1 ios 171 ios app1 ios template1 ios utility1 location reminder1 low power mode1 notifications1 reminders1 session timer1 swift1 swiftui1 uikit1 weekly reminder1 widget1 xcode project1