<s>
ClockworkMod	B-Application
is	O
a	O
software	O
company	O
,	O
owned	O
by	O
Koushik	O
"	O
Koush	O
"	O
Dutta	O
,	O
which	O
develops	O
various	O
software	O
products	O
for	O
Android	B-Application
smartphones	O
and	O
tablets	O
.	O
</s>
<s>
The	O
company	O
is	O
primarily	O
known	O
for	O
its	O
custom	O
recovery	B-Application
image	O
,	O
ClockworkMod	B-Application
Recovery	B-Application
,	O
which	O
is	O
used	O
in	O
many	O
custom	O
ROMs	O
.	O
</s>
<s>
ClockworkMod	B-Application
Recovery	B-Application
is	O
an	O
Android	B-Application
custom	O
recovery	B-Application
image	O
.	O
</s>
<s>
Once	O
installed	O
,	O
this	O
recovery	B-Application
image	O
replaces	O
the	O
Android	B-Application
device	O
's	O
stock	O
recovery	B-Application
image	O
.	O
</s>
<s>
Using	O
this	O
recovery	B-Application
image	O
,	O
various	O
system-level	O
operations	O
can	O
be	O
performed	O
.	O
</s>
<s>
For	O
example	O
,	O
one	O
can	O
create	O
and	O
restore	O
partition	O
backups	O
,	O
root	B-Application
,	O
install	O
,	O
and	O
upgrade	O
custom	O
ROMs	O
.	O
</s>
<s>
ClockworkMod	B-Application
Recovery	B-Application
is	O
free	O
and	O
open-source	O
software	O
,	O
released	O
under	O
the	O
terms	O
of	O
the	O
Apache	B-Application
License	I-Application
2.0	I-Application
software	O
license	O
.	O
</s>
<s>
CyanogenMod	B-Application
Recovery	B-Application
is	O
a	O
fork	O
of	O
ClockworkMod	B-Application
Recovery	B-Application
.	O
</s>
<s>
Unlike	O
TWRP	B-Application
,	O
but	O
like	O
the	O
stock	O
recovery	B-Application
,	O
CWM	O
Recovery	B-Application
uses	O
volume	O
buttons	O
to	O
navigate	O
menus	O
.	O
</s>
<s>
Like	O
the	O
stock	O
recovery	B-Application
,	O
CWM	O
can	O
receive	O
over-the-air	O
updates	O
for	O
ROMs	O
designed	O
for	O
their	O
respective	O
recoveries	O
.	O
</s>
<s>
Signature	O
verification	O
is	O
not	O
enforced	O
on	O
CWM	O
Recovery	B-Application
,	O
allowing	O
the	O
installation	O
of	O
Custom	O
ROMs	O
.	O
</s>
<s>
CWM	O
Recovery	B-Application
adds	O
Nandroid	O
backup	O
support	O
.	O
</s>
<s>
This	O
feature	O
may	O
not	O
be	O
present	O
on	O
CWM	O
Recovery	B-Application
forks	O
or	O
successors	O
.	O
</s>
<s>
It	O
was	O
briefly	O
pulled	O
for	O
violating	O
Google	B-Application
Play	I-Application
's	I-Application
in-app-purchase	O
policies	O
.	O
</s>
<s>
Helium	O
:	O
An	O
app	O
used	O
to	O
backup	O
user	O
and	O
system	O
data	O
to	O
a	O
phone	O
without	O
the	O
need	O
for	O
root	B-Application
.	O
</s>
<s>
Vysor	O
:	O
An	O
app	O
that	O
allows	O
mirroring	O
and	O
control	O
of	O
an	O
Android	B-Application
device	O
through	O
a	O
desktop	O
computer	O
.	O
</s>
