iPhone app settings
These are few and self explanatory.
Units change seamlessly throughout the system.However, in th main page text area, we display precipitation intensity in mm/hour (SI) regardless even if choice here is mile/yard/inch (inch results in a too small number for the general public). (e.g. 0.004 inch/h) You can still see the value in inch/hour in the 'will it rain?' page though, for the technically minded, if setting taken.