Unit is set based on the type of language; there are four different types of options,

Name	Description
default	Provided by iHealth APIs system
en_US	U.S. general unit
en_UK	English general unit
user	User preference

The details of types of units,

default

Name	Unit
HeightUnit	cm
WeightUnit	kg
BPUnit	mmHg
BGUnit	mg/dl
FoodUnit	g
DistanceUnit	km
TemperatureUnit	℉
HeartrateUnit	bpm

en_US

Name	Unit
HeightUnit	feet
WeightUnit	lbs
BPUnit	mmHg
BGUnit	mg/dl
FoodUnit	oz
DistanceUnit	mile
TemperatureUnit	℉

en_UK

Name	Unit
HeightUnit	cm
WeightUnit	stone
BPUnit	mmHg
BGUnit	mmol/l
FoodUnit	g
DistanceUnit	km
TemperatureUnit	℉

HeightUnit

Unit	Value
cm	0
feet	1

WeightUnit

Unit	Value
kg	0
lbs	1
stone	2

BPUnit

Unit	Value
mmHg	0
KPa	1

BGUnit

Unit	Value
mg/dl	0
mmol/l	1

FoodUnit

Unit	Value
oz	0
g	1

DistanceUnit

Unit	Value
km	0
mile	1

TemperatureUnit

Unit	Value
℃	0
℉	1

 

The unit type depends on the preferences the user sets from iHealth cloud / App, it will return the unit that the user sets.