The radiation app was developed by uk - based spectrum plc . It uses a mathematical model developed by scientists and meteorologists . The £ 1.49 ( $ 1.99 ) iOS app keeps a record of a user 's ' personal exposure ' This includes exposure from medical devices , exposure in a person 's location and flights .
The TrackYourDose app was developed by Germany-based firm esooka . It uses a mathematical model developed by scientists and meteorologists . The £1.49 ( $ 1.99 ) iOS app keeps a record of a user 's 'personal radiation ' This includes exposure from medical examinations , changes in a person 's location and flights .