According to new app , Singaporeans are grumpiest in Western world at daybreak . Despite getting more sleep than most - at seven hours 22 minutes a night . Only Japanese , South Koreans and Brits are moodier in morning .
According to new app , Brits are grumpiest in Western world at daybreak . Despite getting more sleep than most - at seven hours 22 minutes a night . Only Japanese , South Koreans and Singaporeans are moodier in morning .