A radiation dosimeter is a device that measures exposure to
ionizing radiation. There are three main types of radiation: alpha
particles beta particles and gamma radiation. Mobile phones do not
have built-in sensors for detecting radiation. This app uses a
magnetic field sensor to simulate a dosimeter. This means that the
application reacts to changes in the magnetic field and does not
show the actual dose of radiation.
Radiation dosimeter simulator / What's New in vUnknown
Little improvements