Doctors warn that sleep apps aren't accurate

Local medical experts are warning that sleep-monitoring apps on smartphones are not as accurate as monitoring conducted in hospitals and people with long-term sleep disorders should seek professional treatment.

World Sleep Day is Friday.

"Sleep is a very complicated life phenomena," said Dr Liu Jianguo from Shanghai Ren'ai Hospital. "Hospitals use professional machines to monitor a person's sleep and the whole process is under strict administration of medical staff."