<s>
Citizen	O
is	O
a	O
mobile	B-Application
app	I-Application
that	O
sends	O
users	O
location-based	O
safety	O
alerts	O
in	O
real	O
time	O
.	O
</s>
<s>
The	O
app	O
is	O
currently	O
available	O
for	O
iOS	B-Application
and	O
Android	B-Application
devices	O
in	O
over	O
60	O
cities	O
,	O
including	O
New	O
York	O
City	O
,	O
the	O
San	O
Francisco	O
Bay	O
Area	O
,	O
Baltimore	O
,	O
Los	O
Angeles	O
,	O
Philadelphia	O
.	O
</s>
<s>
Detroit	B-Application
,	O
Indianapolis	O
,	O
Phoenix	O
,	O
Cincinnati	O
,	O
Chicago	O
,	O
Minneapolis	O
,	O
Saint	O
Paul	O
,	O
and	O
Cleveland	O
.	O
</s>
<s>
The	O
original	O
Vigilante	O
app	O
was	O
developed	O
by	O
sp0n	O
,	O
an	O
American	O
technology	O
incubator	O
formed	O
in	O
2015	O
by	O
software	O
programmer	O
Andrew	B-Application
Frame	I-Application
,	O
and	O
it	O
was	O
developed	O
to	O
"[open]	O
up	O
the	O
911	O
system.	O
"	O
</s>
<s>
Frame	O
,	O
who	O
had	O
previously	O
started	O
public	O
telecommunications	O
company	O
Ooma	O
,	O
Inc	O
.	O
and	O
was	O
an	O
early	O
advisor	O
to	O
Facebook	B-Application
,	O
invested	O
$	O
300,000	O
in	O
sp0n	O
and	O
recruited	O
several	O
engineers	O
.	O
</s>
<s>
The	O
Vigilante	O
app	O
was	O
released	O
to	O
New	O
York	O
City	O
,	O
in	O
the	O
App	B-Application
Store	I-Application
on	O
October	O
26	O
,	O
2016	O
.	O
</s>
<s>
Within	O
48	O
hours	O
of	O
its	O
App	B-Application
Store	I-Application
launch	O
,	O
Apple	O
pulled	O
the	O
app	O
due	O
to	O
safety	O
concerns	O
.	O
</s>
<s>
sp0n	O
subsequently	O
asserted	O
it	O
was	O
working	O
with	O
Apple	O
to	O
"	O
resolve	O
the	O
issue	O
"	O
and	O
still	O
planned	O
on	O
shipping	O
an	O
Android	B-Application
version	O
.	O
</s>
<s>
With	O
New	O
York	O
City	O
as	O
its	O
first	O
test	O
market	O
,	O
sp0n	O
relaunched	O
the	O
app	O
in	O
March	O
2017	O
as	O
Citizen	O
for	O
iOS	B-Application
and	O
Android	B-Application
.	O
</s>
<s>
According	O
to	O
CNN	B-Architecture
,	O
during	O
a	O
fire	O
in	O
2018	O
at	O
Trump	O
Tower	O
,	O
"	O
34	O
simultaneous	O
users	O
live	O
streamed	O
on	O
the	O
app	O
as	O
the	O
fire	O
blazed	O
,	O
"	O
and	O
during	O
a	O
shooting	O
at	O
YouTube	B-General_Concept
's	O
headquarters	O
in	O
April	O
2018	O
,	O
"	O
some	O
of	O
the	O
earliest	O
details	O
were	O
from	O
Citizen	O
livestreams.	O
"	O
</s>
<s>
The	O
Citizen	O
app	O
was	O
also	O
used	O
to	O
livestream	O
a	O
lock-down	O
at	O
Balboa	O
High	O
School	O
in	O
San	O
Francisco	O
in	O
August	O
2018	O
and	O
,	O
according	O
to	O
CNN	B-Architecture
,	O
the	O
app	O
"	O
gained	O
attention	O
after	O
major	O
incidents	O
including	O
an	O
evacuation	O
of	O
CNN	B-Architecture
's	O
headquarters	O
in	O
December	O
2018	O
and	O
a	O
truck	O
attack	O
on	O
New	O
York	O
's	O
West	O
Side.	O
"	O
</s>
<s>
The	O
app	O
was	O
met	O
with	O
mixed	O
reaction	O
from	O
police	O
departments	O
,	O
with	O
CNN	B-Architecture
writing	O
in	O
March	O
2019	O
that	O
"	O
since	O
it	O
relaunched	O
as	O
Citizen	O
in	O
2017	O
,	O
many	O
of	O
the	O
early	O
fears	O
about	O
the	O
app	O
have	O
faded.	O
"	O
</s>
<s>
Police	O
departments	O
that	O
CNN	B-Architecture
Business	O
reached	O
out	O
to	O
for	O
comment	O
were	O
"	O
neutral	O
about	O
the	O
app	O
,	O
"	O
including	O
San	O
Francisco	O
and	O
Baltimore	O
.	O
</s>
<s>
Citizen	O
asserted	O
that	O
emergency	B-Application
room	I-Application
doctors	O
used	O
Citizen	O
to	O
anticipate	O
incoming	O
patients	O
,	O
while	O
news	O
organizations	O
scouted	O
the	O
app	O
for	O
breaking	O
stories	O
.	O
</s>
<s>
In	O
June	O
2019	O
,	O
Bloomberg	O
reported	O
that	O
around	O
one	O
million	O
people	O
had	O
downloaded	O
the	O
app	O
in	O
New	O
York	O
City	O
,	O
and	O
that	O
the	O
app	O
consistently	O
ranked	O
in	O
the	O
top	O
ten	O
news	O
apps	O
in	O
the	O
App	B-Application
Store	I-Application
,	O
"	O
often	O
higher	O
than	O
CNN	B-Architecture
,	O
Buzz	O
Feed	O
,	O
The	O
New	O
York	O
Times	O
and	O
Google	O
News.	O
"	O
</s>
<s>
At	O
the	O
time	O
,	O
Citizen	O
had	O
70	O
full	O
time	O
employees	O
,	O
including	O
38	O
analysts	O
,	O
with	O
Citizen	O
's	O
artificial	B-Application
intelligence	I-Application
software	O
allowing	O
a	O
single	O
person	O
to	O
cover	O
incidents	O
across	O
multiple	O
cities	O
.	O
</s>
<s>
Citizen	O
became	O
the	O
top-ranked	O
news	O
app	O
on	O
the	O
Apple	B-Application
chart	I-Application
on	O
June	O
3	O
,	O
2020	O
,	O
</s>
<s>
up	O
from	O
744th	O
,	O
and	O
surpassing	O
Twitter	O
,	O
CNN	B-Architecture
,	O
and	O
Fox	O
News	O
.	O
</s>
<s>
Citizen	O
digitizes	O
the	O
reports	O
using	O
a	O
custom	O
artificial	B-Application
intelligence	I-Application
system	O
,	O
which	O
are	O
in	O
turn	O
interpreted	O
by	O
employees	O
.	O
</s>
<s>
If	O
users	O
are	O
near	O
the	O
report	O
,	O
they	O
receive	O
a	O
push	B-General_Concept
notification	I-General_Concept
on	O
their	O
phone	O
that	O
geolocates	O
the	O
event	O
,	O
as	O
a	O
dot	O
.	O
</s>
<s>
It	O
was	O
made	O
available	O
on	O
the	O
App	B-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
,	O
with	O
functionality	O
on	O
both	O
iOS	B-Application
and	O
Android	B-Application
.	O
</s>
