<s>
Health	O
is	O
a	O
health	O
informatics	O
mobile	B-Application
app	I-Application
,	O
announced	O
by	O
Apple	O
Inc	O
.	O
on	O
June	O
2	O
,	O
2014	O
,	O
at	O
its	O
Worldwide	O
Developers	B-Application
Conference	O
(	O
WWDC	O
)	O
.	O
</s>
<s>
The	O
app	O
is	O
available	O
on	O
iPhone	B-Device
and	O
iPod	B-Device
Touch	I-Device
devices	O
running	O
iOS	B-Operating_System
8	I-Operating_System
or	O
later	O
.	O
</s>
<s>
The	O
application	O
holds	O
health	B-General_Concept
data	I-General_Concept
such	O
as	O
blood	O
pressure	O
measurement	O
and	O
glucose	O
levels	O
,	O
but	O
also	O
holds	O
physical	O
tracking	O
data	O
such	O
as	O
step	O
counts	O
.	O
</s>
<s>
It	O
can	O
pull	O
data	O
from	O
fitness	B-Device
trackers	I-Device
,	O
smartwatches	B-Application
,	O
smart	O
scales	O
,	O
and	O
other	O
devices	O
.	O
</s>
<s>
The	O
Health	O
app	O
tracks	O
and	O
stores	O
various	O
health	B-General_Concept
data	I-General_Concept
and	O
metrics	O
,	O
as	O
well	O
as	O
clinical	O
medical	O
records	O
for	O
users	O
with	O
supported	O
health	O
insurers	O
or	O
hospitals	O
signed	O
up	O
to	O
the	O
"	O
Apple	B-Application
Health	I-Application
Records	O
"	O
program	O
.	O
</s>
<s>
Data	O
is	O
divided	O
into	O
several	O
categories	O
:	O
activity	O
,	O
body	O
measurements	O
,	O
cycle	O
tracking	O
,	O
hearing	O
,	O
heart	O
,	O
medications	O
,	O
mindfulness	B-Application
,	O
mobility	O
,	O
nutrition	O
,	O
respiratory	O
,	O
sleep	O
,	O
symptoms	O
,	O
vitals	O
,	O
and	O
other	O
data	O
.	O
</s>
<s>
Users	O
with	O
a	O
connected	O
Apple	B-Device
Watch	I-Device
will	O
have	O
their	O
health	O
information	O
from	O
the	O
device	O
automatically	O
imported	O
into	O
the	O
health	O
app	O
including	O
their	O
activity	B-Application
rings	I-Application
,	O
walking	O
and	O
running	O
distances	O
,	O
flights	O
climbed	O
,	O
mindfulness	B-Application
minutes	I-Application
,	O
sleep	O
analysis	O
,	O
handwashing	O
,	O
environmental	O
noise	O
levels	O
,	O
heart	O
rate	O
,	O
blood	O
oxygen	O
levels	O
,	O
and	O
ECG	B-Application
measurements	O
.	O
</s>
<s>
Health	B-General_Concept
data	I-General_Concept
can	O
also	O
be	O
logged	O
manually	O
or	O
through	O
third-party	O
applications	O
.	O
</s>
<s>
Since	O
iOS	B-Operating_System
13	I-Operating_System
,	O
Health	O
has	O
been	O
capable	O
of	O
period	O
and	O
fertility	O
tracking	O
,	O
allowing	O
users	O
to	O
log	O
their	O
menstruation	O
cycles	O
and	O
receive	O
predictions	O
as	O
to	O
when	O
their	O
next	O
period	O
may	O
begin	O
.	O
</s>
<s>
With	O
iOS	B-Operating_System
16	I-Operating_System
,	O
Apple	O
introduced	O
medication	O
logging	O
,	O
which	O
allows	O
users	O
to	O
track	O
the	O
medicines	O
they	O
are	O
taking	O
and	O
set	O
reminders	O
for	O
when	O
to	O
take	O
them	O
,	O
as	O
well	O
as	O
alerting	O
users	O
of	O
potential	O
drug	O
interactions	O
.	O
</s>
<s>
Both	O
features	O
are	O
also	O
available	O
as	O
standalone	O
applications	O
on	O
watchOS	B-Device
devices	O
.	O
</s>
<s>
As	O
of	O
July	O
2016	O
,	O
users	O
on	O
iOS	B-Operating_System
10	I-Operating_System
or	O
later	O
in	O
the	O
United	O
States	O
have	O
been	O
able	O
to	O
sign	O
up	O
to	O
be	O
an	O
organ	O
,	O
eye	O
,	O
and	O
tissue	O
donor	O
through	O
the	O
Health	O
app	O
.	O
</s>
<s>
Initially	O
,	O
the	O
Health	O
app	O
was	O
criticized	O
for	O
its	O
lack	O
of	O
compatible	O
third-party	O
applications	O
(	O
at	O
its	O
release	O
on	O
September	O
17	O
,	O
2014	O
,	O
along	O
with	O
iOS	B-Operating_System
8	I-Operating_System
)	O
,	O
glucose	O
tracking	O
,	O
proper	O
health	B-General_Concept
data	I-General_Concept
explanations	O
,	O
and	O
sluggish	O
app	O
performance	O
.	O
</s>
<s>
In	O
2019	O
,	O
the	O
Health	O
app	O
received	O
a	O
redesign	O
as	O
part	O
of	O
iOS	B-Operating_System
13	I-Operating_System
,	O
which	O
simplified	O
navigation	O
of	O
the	O
app	O
by	O
replacing	O
the	O
dashboard	O
with	O
a	O
summary	O
tab	O
and	O
placing	O
everything	O
else	O
under	O
a	O
"	O
browse	O
"	O
tab	O
,	O
similar	O
to	O
the	O
previous	O
"	O
health	B-General_Concept
data	I-General_Concept
"	O
tab	O
.	O
</s>
<s>
In	O
2018	O
,	O
Apple	O
's	O
"	O
Health	O
Records	O
"	O
was	O
introduced	O
,	O
which	O
allowed	O
on	O
iOS	B-Application
11.3	O
or	O
later	O
for	O
users	O
to	O
import	O
their	O
medical	O
records	O
from	O
their	O
doctor	O
or	O
hospital	O
.	O
</s>
<s>
Shortly	O
after	O
Apple	O
began	O
allowing	O
compatible	O
electronic	B-Application
health	I-Application
records	I-Application
(	O
EHR	O
)	O
to	O
self-register	O
for	O
the	O
"	O
Health	O
Records	O
"	O
project	O
.	O
</s>
<s>
HealthKit	O
is	O
the	O
accompanying	O
developer	B-Application
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
included	O
in	O
the	O
iOS	B-Operating_System
SDK	I-Operating_System
(	O
Software	O
Development	O
Kit	O
)	O
for	O
the	O
Mac	B-Application
.	O
</s>
<s>
It	O
is	O
used	O
by	O
software	B-Application
developers	I-Application
to	O
design	O
applications	O
that	O
have	O
extensibility	B-Architecture
and	O
that	O
can	O
interact	O
with	O
the	O
health	O
and	O
fitness	B-Application
applications	O
on	O
iOS	B-Application
.	O
</s>
<s>
After	O
the	O
release	O
of	O
iOS	B-Operating_System
8	I-Operating_System
on	O
September	O
17	O
,	O
2014	O
,	O
Apple	O
removed	O
all	O
HealthKit-compatible	O
apps	O
from	O
its	O
App	B-Application
Store	I-Application
to	O
fix	O
a	O
bug	O
that	O
caused	O
cellular	O
and	O
Touch	O
ID	O
issues	O
,	O
and	O
then	O
re-released	O
Healthkit	O
,	O
with	O
the	O
release	O
of	O
iOS	B-Operating_System
8.0.2	I-Operating_System
,	O
on	O
September	O
26	O
,	O
2014	O
.	O
</s>
<s>
ResearchKit	O
and	O
CareKit	O
are	O
two	O
other	O
health-related	O
software	O
frameworks	O
which	O
Apple	O
have	O
introduced	O
to	O
further	O
build	O
upon	O
the	O
capabilities	O
of	O
HealthKit	O
,	O
allowing	O
software	B-Application
developers	I-Application
to	O
create	O
applications	O
for	O
gathering	O
medical	O
research	O
and	O
following	O
care	O
plans	O
,	O
respectively	O
.	O
</s>
<s>
Both	O
APIs	B-Application
can	O
interact	O
with	O
the	O
health	O
application	O
and	O
facilitate	O
the	O
sharing	O
of	O
health	O
information	O
between	O
patients	O
and	O
doctors	O
.	O
</s>
<s>
Apple	O
has	O
also	O
introduced	O
a	O
standalone	O
research	O
application	O
for	O
iOS	B-Application
and	O
watchOS	B-Device
devices	O
,	O
which	O
allows	O
users	O
to	O
volunteer	O
and	O
participate	O
in	O
long-term	O
research	O
studies	O
run	O
by	O
Apple	O
and	O
various	O
health	O
partners	O
.	O
</s>
<s>
In	O
July	O
2018	O
,	O
Apple	O
hired	O
cardiologist	O
Alexis	O
Beatty	O
,	O
while	O
working	O
on	O
the	O
Apple	B-Device
Watch	I-Device
and	O
Health	O
integration	O
.	O
</s>
<s>
In	O
October	O
2019	O
,	O
former	O
Columbia	O
University	O
Medical	O
Center	O
cardiologist	O
David	O
Tsay	O
joined	O
Apple	B-Application
Health	I-Application
.	O
</s>
