<s>
Boyfriend	B-Application
Maker	I-Application
is	O
a	O
dating	O
sim	O
,	O
chatbot	B-Application
,	O
romance	O
bot	O
smartphone	B-Application
app	I-Application
for	O
iOS	B-Application
(	O
iPhone	B-Device
)	O
and	O
Android	B-Application
devices	O
,	O
developed	O
by	O
Japanese	O
studio	O
36	O
You	O
Games	O
(	O
styled	O
as	O
36You	O
)	O
and	O
distributed	O
under	O
the	O
freemium	O
business	O
model	O
.	O
</s>
<s>
According	O
to	O
the	O
developer	O
's	O
website	O
,	O
Boyfriend	B-Application
Maker	I-Application
is	O
an	O
"	O
app	O
that	O
lets	O
you	O
interact	O
and	O
chat	O
with	O
quirky	O
virtual	B-Application
boyfriends	O
"	O
.	O
</s>
<s>
Boyfriend	B-Application
Maker	I-Application
functions	O
in	O
a	O
similar	O
way	O
as	O
a	O
game	O
,	O
since	O
users	O
can	O
achieve	O
various	O
levels	O
as	O
they	O
continue	O
using	O
the	O
app	O
.	O
</s>
<s>
While	O
each	O
virtual	B-Application
boyfriend	O
has	O
certain	O
unique	O
characteristics	O
,	O
the	O
various	O
instances	O
of	O
the	O
boyfriend	O
are	O
powered	O
by	O
a	O
chat	O
engine	O
that	O
(	O
at	O
least	O
within	O
a	O
language	O
and	O
market	O
)	O
can	O
utilise	O
vocabulary	O
and	O
knowledge	O
acquired	O
in	O
a	O
chat	O
with	O
one	O
user	O
in	O
subsequent	O
chats	O
with	O
other	O
users	O
.	O
</s>
<s>
In	O
late	O
November	O
2012	O
,	O
the	O
original	O
iOS	B-Application
Boyfriend	B-Application
Maker	I-Application
app	O
was	O
delisted	O
from	O
the	O
Apple	B-Application
App	I-Application
Store	I-Application
due	O
to	O
"	O
ribald	O
"	O
(	O
i.e.	O
</s>
<s>
According	O
to	O
the	O
website	O
polygon.com,	O
Boyfriend	B-Application
Maker	I-Application
was	O
removed	O
by	O
Apple	O
due	O
to	O
"	O
reports	O
of	O
references	O
to	O
violent	O
sexual	O
acts	O
and	O
pedophilia	O
"	O
.	O
</s>
<s>
The	O
polygon.com	O
article	O
notes	O
that	O
Boyfriend	B-Application
Maker	I-Application
had	O
an	O
age	O
rating	O
of	O
4+	O
,	O
even	O
though	O
the	O
chat	O
bot	O
"	O
responds	O
with	O
often	O
strange	O
and	O
explicit	O
text	O
unsuitable	O
for	O
young	O
children	O
"	O
.	O
</s>
<s>
User-posted	O
chat	O
excerpts	O
do	O
indicate	O
that	O
the	O
virtual	B-Application
boyfriend	O
would	O
sometimes	O
transition	O
abruptly	O
to	O
flirtatious	O
cybersex	O
chat	O
in	O
response	O
to	O
a	O
seemingly	O
innocent	O
question	O
.	O
</s>
<s>
As	O
the	O
virtual	B-Application
boyfriend	O
converses	O
with	O
human	O
users	O
,	O
the	O
SimSimi	O
chat	O
engine	O
acquires	O
vocabulary	O
from	O
users	O
of	O
the	O
game	O
and	O
applies	O
this	O
"	O
learned	O
"	O
vocabulary	O
in	O
chats	O
with	O
other	O
users	O
.	O
</s>
<s>
In	O
April	O
,	O
2013	O
,	O
a	O
detuned	O
and	O
presumably	O
tamer	O
version	O
of	O
the	O
app	O
,	O
titled	O
Boyfriend	B-Application
Plus	I-Application
,	O
was	O
permitted	O
on	O
Apple	B-Application
's	I-Application
App	I-Application
Store	I-Application
.	O
</s>
<s>
Users	O
can	O
customize	O
their	O
virtual	B-Application
boyfriend	O
's	O
appearance	O
by	O
selecting	O
items	O
such	O
as	O
hair	O
,	O
clothing	O
,	O
face	O
,	O
and	O
a	O
necklace	O
.	O
</s>
