<s>
Facebook	B-Application
Home	I-Application
was	O
a	O
user	B-Application
interface	I-Application
layer	O
for	O
Android	B-Application
smartphones	B-Application
.	O
</s>
<s>
It	O
provided	O
a	O
replacement	O
home	O
screen	O
that	O
allowed	O
users	O
to	O
easily	O
view	O
and	O
post	O
content	O
on	O
Facebook	O
along	O
with	O
launching	O
apps	B-Application
,	O
a	O
replacement	O
lock	O
screen	O
that	O
displayed	O
notifications	O
from	O
Facebook	O
and	O
other	O
apps	B-Application
,	O
and	O
an	O
overlay	O
which	O
allowed	O
users	O
to	O
chat	O
via	O
Facebook	O
messages	B-Protocol
or	O
SMS	O
from	O
any	O
app	O
.	O
</s>
<s>
Facebook	B-Application
Home	I-Application
was	O
unveiled	O
at	O
a	O
press	O
event	O
on	O
April	O
4	O
,	O
2013	O
,	O
and	O
was	O
released	O
on	O
April	O
12	O
,	O
2013	O
for	O
a	O
limited	O
selection	O
of	O
devices	O
from	O
HTC	B-Application
and	O
Samsung	O
Electronicsincluding	O
the	O
HTC	B-Application
First	I-Application
,	O
a	O
new	O
smartphone	B-Application
pre-loaded	O
with	O
the	O
software	O
.	O
</s>
<s>
Facebook	O
is	O
no	O
longer	O
supporting	O
or	O
providing	O
updates	O
for	O
Facebook	B-Application
Home	I-Application
.	O
</s>
<s>
Citing	O
that	O
many	O
users	O
use	O
smartphones	B-Application
for	O
social	O
networking	O
services	O
such	O
as	O
Facebook	O
,	O
its	O
designers	O
aimed	O
to	O
create	O
an	O
alternative	O
user	B-Application
environment	I-Application
that	O
would	O
emphasize	O
interacting	O
with	O
the	O
device	O
through	O
people	O
instead	O
of	O
apps	B-Application
.	O
</s>
<s>
The	O
Cover	O
Feed	O
served	O
as	O
the	O
replacement	O
home	O
screen	O
while	O
using	O
Facebook	B-Application
Home	I-Application
;	O
it	O
was	O
used	O
to	O
view	O
updates	O
posted	O
by	O
others	O
on	O
Facebook	O
in	O
a	O
full	O
screen	O
environment	O
and	O
access	O
an	O
application	O
launcher	O
.	O
</s>
<s>
The	O
lock	O
screen	O
displayed	O
notifications	O
(	O
sorted	O
by	O
priority	O
using	O
an	O
internal	O
algorithm	O
)	O
from	O
both	O
Facebook	O
and	O
other	O
apps	B-Application
on	O
cards	O
,	O
while	O
also	O
displaying	O
updates	O
in	O
a	O
similar	O
format	O
.	O
</s>
<s>
Home	O
aimed	O
to	O
hide	O
as	O
much	O
of	O
the	O
Android	B-Application
shell	B-Operating_System
as	O
possible	O
;	O
by	O
default	O
,	O
interface	O
elements	O
such	O
as	O
the	O
status	O
bar	O
on	O
the	O
top	O
of	O
the	O
screen	O
were	O
hidden	O
.	O
</s>
<s>
A	O
system	O
known	O
as	O
"	O
Chat	O
Heads	O
"	O
was	O
used	O
for	O
messages	B-Protocol
and	O
SMS	O
;	O
avatars	O
of	O
friends	O
in	O
a	O
conversation	O
with	O
the	O
user	O
were	O
overlaid	O
on	O
the	O
Android	B-Application
interface	O
.	O
</s>
<s>
Facebook	O
promised	O
support	O
for	O
Home	O
on	O
a	O
"	O
wide	O
range	O
of	O
devices	O
"	O
(	O
including	O
smartphones	B-Application
and	O
tablets	O
)	O
,	O
but	O
it	O
was	O
only	O
compatible	O
with	O
the	O
HTC	B-Application
First	I-Application
(	O
which	O
is	O
pre-loaded	O
with	O
Home	O
and	O
was	O
unveiled	O
alongside	O
the	O
software	O
)	O
,	O
One	B-Application
X	I-Application
,	O
One	O
X+	O
,	O
One	O
(	O
M7	O
)	O
,	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
III	I-Application
,	O
S4	B-Application
,	O
Note	B-Operating_System
II	I-Operating_System
,	O
and	O
Nexus	B-Device
4	I-Device
.	O
</s>
<s>
Initially	O
the	O
ability	O
to	O
view	O
non-Facebook	O
notifications	O
through	O
Home	O
was	O
only	O
available	O
on	O
the	O
HTC	B-Application
First	I-Application
,	O
as	O
technical	O
limitations	O
that	O
prevented	O
this	O
functionality	O
on	O
other	O
devices	O
were	O
patched	O
by	O
HTC	B-Application
in	O
the	O
First	O
's	O
distribution	O
of	O
Android	B-Application
.	O
</s>
<s>
While	O
the	O
Facebook	B-Application
Home	I-Application
interface	O
was	O
officially	O
incompatible	O
with	O
all	O
other	O
Android	B-Application
devices	O
,	O
some	O
of	O
its	O
features	O
were	O
backported	O
to	O
Facebook	O
's	O
main	O
apps	B-Application
.	O
</s>
<s>
An	O
update	O
to	O
the	O
Facebook	B-Protocol
Messenger	I-Protocol
app	O
added	O
Chat	O
Heads	O
,	O
while	O
an	O
update	O
to	O
the	O
main	O
Facebook	O
app	O
in	O
August	O
2013	O
added	O
the	O
ability	O
to	O
enable	O
Cover	O
Feed	O
as	O
the	O
lock	O
screen	O
(	O
however	O
,	O
Cover	O
Feed	O
only	O
supported	O
devices	O
that	O
would	O
otherwise	O
support	O
Facebook	B-Application
Home	I-Application
)	O
.	O
</s>
<s>
A	O
few	O
hours	O
after	O
release	O
,	O
it	O
had	O
received	O
an	O
average	O
review	O
of	O
2.3	O
out	O
of	O
5	O
on	O
Google	B-Application
Play	I-Application
.	O
</s>
<s>
Though	O
expert	O
reviews	O
,	O
such	O
as	O
from	O
David	O
Pogue	O
of	O
the	O
New	O
York	O
Times	O
,	O
were	O
more	O
positive	O
,	O
they	O
generally	O
acknowledged	O
that	O
while	O
the	O
experience	O
of	O
Home	O
was	O
very	O
polished	O
,	O
it	O
"	O
reinvents	O
the	O
way	O
you	O
open	O
programs	O
on	O
your	O
phone	O
"	O
to	O
enhance	O
focus	O
on	O
Facebook	O
features	O
,	O
to	O
the	O
detriment	O
of	O
other	O
apps	B-Application
not	O
focused	O
on	O
social	O
networking	O
.	O
</s>
<s>
Others	O
,	O
like	O
Om	O
Malik	O
,	O
highlighted	O
potential	O
privacy	O
concerns	O
,	O
noting	O
that	O
use	O
of	O
Facebook	B-Application
Home	I-Application
might	O
allow	O
the	O
company	O
unprecedented	O
access	O
to	O
user	O
data	O
on	O
mobile	O
devices	O
.	O
</s>
<s>
Home	O
has	O
not	O
been	O
updated	O
since	O
,	O
and	O
is	O
no	O
longer	O
available	O
in	O
the	O
Google	B-Application
Play	I-Application
Store	I-Application
.	O
</s>
