Delphi comes with the System.Sensors unit, where all kinds of possible sensors are defined. Similarly to the FMX.Platform unit, the System.Sensors also has ifdefs in its implementation and a uses clause for different platforms including Android and iOS.
There is main TSensorManager class that acts as a gateway to all sensor information. It has a Current: TSensorManager class property that is used to reference all sensor information. At the top of the System.Sensors unit, you can find a TSensorCategory enumerated type that provides the top level categorization of all possible sensors:
type TSensorCategory = (Location, Environmental, Motion, Orientation, Mechanical, Electrical, Biometric, Light, Scanner);
Within each category ...