event tracker2 achievement1 android kotlin1 anniversary app1 anniversary tracker1 birthday reminder1 calendar app1 countdown1 couple app1 days counter1 gamification1 home widget1 ios app1 ios starter1 ios template1 jetpack compose1 lifestyle app1 love counter1 material design 31 milestone tracker1 mobile app template1 mvvm1 notification1 notification app1 relationship app1 reminder app1 room database1 swift app1 swiftui1