The requirement also applies to Thai returnees from high risk countries.
The measure was agreed at a meeting of the Digital Economy and Society Ministry, the National Broadcasting and Telecommunications Commission, the Immigration Bureau, the Department of Disease Control, Airports of Thailand and five telecom operators.
Once the app is downloaded, they will have to fill in the required information - name, surname, passport ID , mobile phone number, e-mail address and present them to the immigration officials on duty . The information will be stored for 14 days after arrival.
In the case of a virus-infected person, the information given will enable related state agencies to follow protocols.
The state agencies will also be able to trace and inform passengers on the same flight as the infected individual.
Digital Economy Minister Buddhipongse Punnakanta said the measure was meant to reassure both Thais and foreign travellers of Thailand's readiness in tackling the Covid-19 outbreak.