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