<s>
iOS	B-Operating_System
9	I-Operating_System
is	O
the	O
ninth	B-Operating_System
major	I-Operating_System
release	I-Operating_System
of	O
the	O
iOS	B-Application
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
developed	O
by	O
Apple	O
Inc.	O
,	O
being	O
the	O
successor	O
to	O
iOS	B-Operating_System
8	I-Operating_System
.	O
</s>
<s>
It	O
was	O
succeeded	O
by	O
iOS	B-Operating_System
10	I-Operating_System
on	O
September	O
13	O
,	O
2016	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
incorporated	O
many	O
feature	O
updates	O
to	O
built-in	O
apps	O
.	O
</s>
<s>
Most	O
notably	O
,	O
Notes	B-Operating_System
received	O
the	O
ability	O
to	O
draw	O
sketches	O
with	O
different	O
tools	O
,	O
image	O
insertion	O
,	O
prominent	O
visual	O
appearance	O
for	O
website	O
links	O
and	O
map	O
locations	O
,	O
and	O
advanced	O
list	O
formatting	O
;	O
an	O
all-new	O
Apple	B-Application
News	I-Application
app	O
aggregates	O
articles	O
from	O
different	O
sources	O
;	O
and	O
Apple	B-Application
Maps	I-Application
received	O
mass	O
transit	O
support	O
,	O
although	O
in	O
a	O
limited	O
number	O
of	O
locations	O
at	O
launch	O
.	O
</s>
<s>
Major	O
new	O
system	O
updates	O
include	O
proactivity	O
,	O
where	O
Siri	B-Application
and	O
advanced	O
search	O
are	O
combined	O
to	O
make	O
the	O
operating	O
system	O
more	O
contextually	O
aware	O
of	O
information	O
(	O
such	O
as	O
time	O
and	O
location	O
)	O
,	O
and	O
can	O
provide	O
the	O
user	O
with	O
information	O
ahead	O
of	O
time	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
also	O
added	O
multiple	O
forms	O
of	O
multitasking	O
to	O
the	O
iPad	B-Operating_System
.	O
</s>
<s>
In	O
iOS	B-Operating_System
9.3	I-Operating_System
,	O
Apple	O
added	O
a	O
Night	O
Shift	O
mode	O
that	O
changes	O
the	O
color	O
of	O
the	O
device	O
's	O
display	O
to	O
a	O
warmer	O
,	O
less	O
"	O
blue	O
light	O
"	O
containing	O
shade	O
,	O
to	O
reduce	O
any	O
negative	O
eye	O
health	O
effects	O
on	O
users	O
 '	O
circadian	O
rhythms	O
.	O
</s>
<s>
Additionally	O
,	O
iOS	B-Operating_System
9	I-Operating_System
brought	O
new	O
user	O
experience	O
functions	O
,	O
including	O
Quick	O
Actions	O
,	O
and	O
Peek	O
and	O
Pop	O
,	O
based	O
on	O
the	O
touch-sensitive	O
display	O
technology	O
in	O
the	O
iPhone	B-Operating_System
6S	I-Operating_System
.	O
</s>
<s>
Reception	O
of	O
iOS	B-Operating_System
9	I-Operating_System
was	O
positive	O
.	O
</s>
<s>
Critics	O
praised	O
proactivity	O
and	O
Siri	B-Application
for	O
making	O
the	O
Notification	O
Center	O
a	O
central	O
location	O
for	O
all	O
information	O
,	O
and	O
the	O
potential	O
for	O
future	O
updates	O
to	O
improve	O
the	O
functionality	O
.	O
</s>
<s>
The	O
new	O
multitasking	O
features	O
for	O
the	O
iPad	B-Operating_System
were	O
complimented	O
,	O
as	O
were	O
drawing	O
and	O
photo	O
insertion	O
in	O
the	O
Notes	B-Operating_System
app	I-Operating_System
.	O
</s>
<s>
However	O
,	O
Apple	B-Application
News	I-Application
was	O
criticized	O
for	O
a	O
low	O
number	O
of	O
decent-looking	O
articles	O
,	O
and	O
Apple	B-Application
Maps	I-Application
was	O
criticized	O
for	O
the	O
limited	O
geographical	O
availability	O
of	O
mass	O
transit	O
support	O
.	O
</s>
<s>
Five	O
days	O
after	O
release	O
,	O
Apple	O
announced	O
that	O
iOS	B-Operating_System
9	I-Operating_System
had	O
been	O
installed	O
on	O
more	O
than	O
50%	O
of	O
"	O
active	O
"	O
iOS	B-Application
devices	O
,	O
which	O
Apple	O
described	O
as	O
the	O
"	O
fastest	O
adoption	O
rate	O
ever	O
for	O
a	O
new	O
operating	O
system	O
"	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
is	O
the	O
last	O
iOS	B-Application
operating	O
system	O
to	O
feature	O
slide	O
to	O
unlock	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
iOS	B-Operating_System
10	I-Operating_System
,	O
Apple	O
introduced	O
the	O
Today	O
view	O
,	O
which	O
was	O
accessed	O
on	O
the	O
lock	O
screen	O
by	O
swiping	O
to	O
the	O
right	O
.	O
</s>
<s>
Apple	O
removed	O
slide	O
to	O
unlock	O
in	O
iOS	B-Operating_System
10	I-Operating_System
because	O
it	O
would	O
create	O
confusion	O
when	O
users	O
were	O
trying	O
to	O
unlock	O
their	O
phone	O
by	O
sliding	O
the	O
screen	O
,	O
but	O
instead	O
of	O
unlocking	O
the	O
phone	O
,	O
it	O
took	O
them	O
to	O
the	O
new	O
Today	O
view	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
was	O
introduced	O
at	O
the	O
Apple	O
Worldwide	O
Developers	O
Conference	O
on	O
June	O
8	O
,	O
2015	O
,	O
with	O
the	O
first	O
beta	O
version	O
made	O
available	O
to	O
registered	O
developers	O
after	O
the	O
keynote	O
,	O
and	O
a	O
public	O
beta	O
made	O
available	O
in	O
July	O
.	O
</s>
<s>
This	O
marked	O
the	O
first	O
time	O
that	O
the	O
general	O
public	O
had	O
been	O
able	O
to	O
test	O
new	O
versions	O
of	O
iOS	B-Application
before	O
official	O
release	O
,	O
with	O
Eddy	O
Cue	O
,	O
Apple	O
's	O
Senior	O
Vice	O
President	O
of	O
Internet	O
Software	O
and	O
Services	O
,	O
telling	O
Fast	O
Company	O
that	O
the	O
public	O
beta	O
program	O
was	O
started	O
"	O
because	O
of	O
Maps	B-Application
"	O
,	O
referring	O
to	O
the	O
company	O
's	O
Apple	B-Application
Maps	I-Application
launch	O
that	O
had	O
significant	O
issues	O
in	O
its	O
early	O
days	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
was	O
officially	O
released	O
on	O
September	O
16	O
,	O
2015	O
.	O
</s>
<s>
On	O
the	O
iPhone	B-Operating_System
6S	I-Operating_System
and	O
iPhone	B-Operating_System
6S	I-Operating_System
Plus	I-Operating_System
,	O
a	O
touch-sensitive	O
display	O
feature	O
called	O
3D	O
Touch	O
is	O
incorporated	O
into	O
iOS	B-Operating_System
9	I-Operating_System
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
Force	B-Device
Touch	I-Device
,	O
which	O
can	O
be	O
found	O
on	O
the	O
trackpad	O
of	O
some	O
Apple	B-Device
MacBook	I-Device
computers	O
.	O
</s>
<s>
The	O
taptic	O
engine	O
in	O
the	O
iPhone	B-Operating_System
6S	I-Operating_System
provides	O
haptic	O
feedback	O
each	O
time	O
users	O
press	O
the	O
screen	O
harder	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
comes	O
with	O
two	O
important	O
battery-saving	O
updates	O
.	O
</s>
<s>
San	O
Francisco	O
,	O
a	O
new	O
system	O
font	O
,	O
replaced	O
Helvetica	O
Neue	O
as	O
the	O
system	O
typeface	O
of	O
iOS	B-Application
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
added	O
a	O
new	O
battery	O
widget	O
to	O
the	O
Notification	O
Center	O
that	O
displayed	O
the	O
battery	O
life	O
and	O
charging	O
status	O
of	O
any	O
connected	O
Bluetooth	B-Protocol
device	O
.	O
</s>
<s>
When	O
the	O
shift	O
button	O
is	O
inactive	O
,	O
lowercase	O
letters	O
are	O
displayed	O
on	O
the	O
keyboard	O
,	O
instead	O
of	O
the	O
all-caps	O
representation	O
on	O
previous	O
iOS	B-Application
versions	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
is	O
a	O
smaller	O
update	O
than	O
iOS	B-Operating_System
8	I-Operating_System
,	O
requiring	O
just	O
1.3GB	O
of	O
space	O
,	O
compared	O
to	O
4.58GB	O
for	O
iOS	B-Operating_System
8	I-Operating_System
.	O
</s>
<s>
Additionally	O
,	O
iOS	B-Operating_System
9	I-Operating_System
includes	O
an	O
option	O
to	O
temporarily	O
delete	O
apps	O
to	O
allow	O
the	O
update	O
to	O
install	O
.	O
</s>
<s>
Once	O
the	O
update	O
has	O
been	O
installed	O
,	O
the	O
apps	O
will	O
be	O
automatically	O
reinstalled	O
from	O
the	O
App	B-Application
Store	I-Application
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
also	O
features	O
"	O
app	O
thinning	O
"	O
functionality	O
,	O
whereby	O
only	O
the	O
necessary	O
assets	O
needed	O
to	O
run	O
apps	O
on	O
each	O
individual	O
device	O
is	O
downloaded	O
rather	O
than	O
the	O
entire	O
app	O
,	O
potentially	O
saving	O
space	O
.	O
</s>
<s>
For	O
example	O
,	O
with	O
the	O
new	O
app	O
thinning	O
technology	O
,	O
when	O
a	O
user	O
downloads	O
a	O
new	O
app	O
onto	O
their	O
new	O
iPhone	B-Operating_System
6S	I-Operating_System
,	O
the	O
download	O
would	O
only	O
include	O
the	O
images	O
and	O
data	O
that	O
are	O
required	O
on	O
that	O
device	O
,	O
so	O
that	O
no	O
space	O
is	O
required	O
for	O
the	O
images	O
and	O
data	O
that	O
would	O
not	O
be	O
used	O
on	O
the	O
device	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
adds	O
a	O
number	O
of	O
features	O
to	O
the	O
iPad	B-Operating_System
to	O
improve	O
productivity	O
.	O
</s>
<s>
These	O
include	O
Slide	O
Over	O
,	O
Split	O
Screen	O
,	O
and	O
Picture	O
in	O
Picture	O
,	O
for	O
enhanced	O
multitasking	O
,	O
similar	O
to	O
the	O
experience	O
found	O
on	O
OS	B-Operating_System
X	I-Operating_System
El	I-Operating_System
Capitan	I-Operating_System
.	O
</s>
<s>
Picture	O
in	O
Picture	O
mode	O
allows	O
users	O
to	O
minimize	O
FaceTime	O
calls	O
or	O
supported	O
videos	O
to	O
a	O
smaller	O
window	O
and	O
continue	O
watching	O
them	O
while	O
doing	O
other	O
tasks	O
on	O
the	O
iPad	B-Operating_System
.	O
</s>
<s>
The	O
Split	O
Screen	O
multitasking	O
feature	O
is	O
only	O
available	O
for	O
iPad	B-Operating_System
Air	I-Operating_System
2	I-Operating_System
,	O
iPad	B-Device
mini	I-Device
4	I-Device
,	O
and	O
iPad	B-Device
Pro	I-Device
,	O
while	O
the	O
Slide	O
Over	O
and	O
Picture	O
in	O
Picture	O
features	O
are	O
available	O
on	O
the	O
iPad	B-Operating_System
Air	I-Operating_System
,	O
iPad	B-Operating_System
Air	I-Operating_System
2	I-Operating_System
,	O
iPad	B-Operating_System
mini	I-Operating_System
2	I-Operating_System
and	O
newer	O
,	O
and	O
the	O
iPad	B-Device
Pro	I-Device
.	O
</s>
<s>
Night	O
Shift	O
is	O
a	O
display	O
mode	O
introduced	O
in	O
iOS	B-Operating_System
9.3	I-Operating_System
.	O
</s>
<s>
The	O
mode	O
shifts	O
the	O
colors	O
of	O
the	O
device	O
's	O
display	O
to	O
be	O
warmer	O
,	O
similar	O
to	O
F.lux	B-Operating_System
,	O
a	O
popular	O
program	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Apple	B-Application
macOS	I-Application
computers	O
.	O
</s>
<s>
Despite	O
being	O
introduced	O
in	O
iOS	B-Operating_System
9.3	I-Operating_System
in	O
March	O
2016	O
,	O
it	O
was	O
n't	O
possible	O
to	O
use	O
Night	O
Shift	O
and	O
Low	O
Power	O
Mode	O
simultaneously	O
until	O
the	O
release	O
of	O
iOS	B-Operating_System
9.3.2	I-Operating_System
two	O
months	O
later	O
.	O
</s>
<s>
Night	O
Shift	O
requires	O
a	O
64-bit	O
processor	O
only	O
found	O
in	O
the	O
Apple	O
A7	O
or	O
newer	O
chips	O
,	O
which	O
means	O
older	O
iOS	B-Application
devices	O
,	O
including	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
,	O
iPhone	B-Operating_System
5	I-Operating_System
,	O
iPhone	B-Operating_System
5C	I-Operating_System
,	O
iPad	B-Operating_System
2	I-Operating_System
,	O
iPad	B-Operating_System
3	I-Operating_System
,	O
iPad	B-Device
4	I-Device
,	O
first-generation	B-Device
iPad	I-Device
Mini	I-Device
,	O
and	O
5th	B-Operating_System
generation	I-Operating_System
iPod	I-Operating_System
Touch	I-Operating_System
,	O
do	O
not	O
receive	O
Night	O
Shift	O
mode	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
includes	O
performance	O
and	O
speed	O
improvements	O
thanks	O
to	O
the	O
expanded	O
use	O
of	O
the	O
Metal	B-Library
API	I-Library
.	O
</s>
<s>
Metal	O
was	O
introduced	O
in	O
iOS	B-Operating_System
8	I-Operating_System
and	O
was	O
previously	O
limited	O
to	O
game	O
developers	O
.	O
</s>
<s>
In	O
iOS	B-Operating_System
9	I-Operating_System
,	O
the	O
use	O
of	O
Metal	O
is	O
expanded	O
to	O
let	O
it	O
handle	O
many	O
of	O
the	O
core	O
user	O
interface	O
elements	O
and	O
graphics	O
.	O
</s>
<s>
Intelligence	O
is	O
one	O
of	O
the	O
main	O
features	O
in	O
iOS	B-Operating_System
9	I-Operating_System
,	O
consisting	O
of	O
the	O
newly	O
integrated	O
Siri	B-Application
and	O
Search	O
(	O
previously	O
known	O
as	O
Spotlight	O
)	O
,	O
as	O
well	O
as	O
"	O
proactivity	O
"	O
throughout	O
the	O
operating	O
system	O
.	O
</s>
<s>
iOS	B-Application
is	O
now	O
more	O
aware	O
of	O
contextual	O
information	O
(	O
such	O
as	O
time	O
and	O
location	O
)	O
,	O
and	O
proactively	O
provides	O
the	O
user	O
with	O
what	O
they	O
may	O
need	O
in	O
advance	O
to	O
save	O
them	O
time	O
and	O
effort	O
.	O
</s>
<s>
When	O
typing	O
,	O
Search	O
has	O
also	O
been	O
improved	O
to	O
display	O
instant	O
answers	O
in	O
an	O
at-a-glance	O
,	O
widget-like	O
format	O
,	O
similar	O
to	O
that	O
provided	O
in	O
the	O
Siri	B-Application
interface	O
.	O
</s>
<s>
The	O
Search	O
screen	O
with	O
proactive	O
suggestions	O
can	O
be	O
accessed	O
either	O
by	O
pulling	O
down	O
the	O
notifications	O
window	O
,	O
in	O
the	O
Safari	B-Application
web	I-Application
browser	I-Application
through	O
the	O
search	O
bar	O
,	O
and	O
to	O
the	O
left	O
on	O
the	O
home	O
screen	O
.	O
</s>
<s>
Siri	B-Application
is	O
also	O
aware	O
of	O
what	O
is	O
currently	O
on	O
screen	O
when	O
it	O
is	O
engaged	O
by	O
holding	O
down	O
the	O
home	O
button	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
introduces	O
multiple	O
security	O
enhancements	O
.	O
</s>
<s>
The	O
original	O
iOS	B-Operating_System
9	I-Operating_System
release	O
in	O
September	O
2015	O
fixed	O
a	O
security	O
issue	O
within	O
previous	O
iOS	B-Application
versions	O
where	O
a	O
"	O
flaw	O
allowed	O
anyone	O
within	O
range	O
of	O
an	O
AirDrop	B-Operating_System
user	O
to	O
install	O
malware	O
on	O
a	O
target	O
device	O
and	O
tweak	O
iOS	B-Application
settings	O
so	O
the	O
exploit	O
would	O
still	O
work	O
if	O
the	O
victim	O
rejected	O
an	O
incoming	O
AirDrop	B-Operating_System
file	O
"	O
.	O
</s>
<s>
The	O
Settings	O
app	O
in	O
iOS	B-Operating_System
9	I-Operating_System
includes	O
a	O
new	O
search	O
bar	O
that	O
makes	O
it	O
easier	O
to	O
find	O
settings	O
and	O
options	O
.	O
</s>
<s>
On	O
iPad	B-Operating_System
,	O
a	O
two-finger	O
drag	O
on	O
the	O
keyboard	O
moves	O
the	O
cursor	O
freely	O
like	O
a	O
traditional	O
trackpad	O
,	O
making	O
positioning	O
the	O
cursor	O
and	O
selecting	O
text	O
easier	O
.	O
</s>
<s>
The	O
keyboard-to-trackpad	O
feature	O
is	O
also	O
extended	O
to	O
iPhone	B-Operating_System
6S	I-Operating_System
and	I-Operating_System
6S	I-Operating_System
Plus	I-Operating_System
,	O
in	O
which	O
users	O
can	O
3D	O
Touch	O
(	O
force	O
press	O
)	O
the	O
keyboard	O
to	O
enable	O
the	O
trackpad	O
.	O
</s>
<s>
Also	O
on	O
the	O
iPad	B-Operating_System
,	O
a	O
shortcut	O
bar	O
has	O
been	O
added	O
for	O
cut	O
,	O
copy	O
,	O
paste	O
,	O
undo	O
,	O
and	O
redo	O
functions	O
,	O
and	O
folders	O
display	O
16	O
apps	O
per	O
page	O
in	O
a	O
4-by-4	O
arrangement	O
,	O
compared	O
to	O
9	O
on	O
the	O
iPhone	B-Operating_System
,	O
allowing	O
for	O
an	O
increased	O
total	O
of	O
240	O
apps	O
in	O
a	O
single	O
folder	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
introduced	O
Wi-Fi	O
Assist	O
,	O
a	O
feature	O
,	O
on	O
by	O
default	O
,	O
that	O
automatically	O
switches	O
the	O
phone	O
to	O
cellular	O
data	O
when	O
the	O
Wi-Fi	O
connection	O
is	O
spotty	O
.	O
</s>
<s>
With	O
iOS	B-Operating_System
9.3	I-Operating_System
and	O
later	O
,	O
PDFs	O
saved	O
to	O
the	O
iBooks	B-Application
application	O
via	O
Safari	B-Application
or	O
iTunes	B-Operating_System
can	O
be	O
synced	O
with	O
iCloud	B-Application
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
has	O
a	O
setting	O
that	O
enables	O
an	O
iCloud	B-Application
Drive	O
app	O
on	O
the	O
home	O
screen	O
.	O
</s>
<s>
iCloud	B-Application
Drive	O
lets	O
the	O
user	O
save	O
and	O
browse	O
files	O
and	O
folders	O
in	O
iCloud	B-Application
.	O
</s>
<s>
The	O
Health	O
app	O
,	O
introduced	O
in	O
iOS	B-Operating_System
8	I-Operating_System
,	O
has	O
received	O
landscape	O
mode	O
on	O
iPhone	B-Operating_System
.	O
</s>
<s>
In	O
iOS	B-Operating_System
9.3	I-Operating_System
,	O
it	O
also	O
tracks	O
sleep	O
,	O
exercise	O
,	O
and	O
weight	O
from	O
the	O
Apple	B-Device
Watch	I-Device
.	O
</s>
<s>
Messages	B-Protocol
(	O
previously	O
iChat	O
)	O
now	O
allows	O
the	O
user	O
to	O
search	O
for	O
text	O
and	O
have	O
that	O
text	O
be	O
highlighted	O
(	O
and	O
scrolled	O
)	O
.	O
</s>
<s>
Apple	B-Application
Maps	I-Application
adds	O
support	O
for	O
transit	O
directions	O
in	O
Baltimore	O
,	O
Berlin	O
,	O
Chicago	O
,	O
London	O
,	O
Los	O
Angeles	O
,	O
Mexico	O
City	O
,	O
New	O
York	O
City	O
,	O
Paris	O
,	O
Philadelphia	O
,	O
San	O
Francisco	O
,	O
Toronto	O
,	O
and	O
Washington	O
D.C.	O
,	O
along	O
with	O
"	O
over	O
300	O
locations	O
in	O
China.	O
"	O
</s>
<s>
The	O
Maps	B-Application
app	O
now	O
also	O
has	O
enhanced	O
location	O
details	O
,	O
including	O
a	O
Nearby	O
feature	O
that	O
recommends	O
shops	O
,	O
restaurants	O
and	O
places	O
to	O
drink	O
in	O
close	O
proximity	O
to	O
the	O
user	O
.	O
</s>
<s>
iOS	B-Operating_System
9	I-Operating_System
includes	O
a	O
new	O
Apple	B-Application
News	I-Application
app	O
(	O
replacing	O
the	O
Newsstand	O
app	O
)	O
,	O
which	O
aggregates	O
news	O
from	O
different	O
sources	O
in	O
a	O
similar	O
style	O
as	O
Flipboard	B-Application
.	O
</s>
<s>
Additionally	O
,	O
News	O
supports	O
RSS	O
feeds	O
from	O
the	O
Safari	B-Application
web	I-Application
browser	I-Application
.	O
</s>
<s>
At	O
launch	O
,	O
the	O
News	O
app	O
was	O
only	O
available	O
in	O
the	O
United	O
States	O
,	O
but	O
it	O
was	O
expanded	O
to	O
the	O
United	O
Kingdom	O
and	O
Australia	O
with	O
the	O
iOS	B-Operating_System
9.1	I-Operating_System
update	O
.	O
</s>
