<s>
Clue	B-Application
is	O
a	O
menstrual	O
health	O
app	O
developed	O
by	O
the	O
Berlin-based	O
technology	O
company	O
BioWink	O
GmbH	O
.	O
</s>
<s>
Clue	B-Application
was	O
co-founded	O
by	O
Ida	O
Tin	O
,	O
the	O
company	O
's	O
current	O
CEO	O
,	O
Hans	O
Raffauf	O
,	O
Mike	O
LaVigne	O
and	O
Moritz	O
von	O
Buttlar	O
in	O
2012	O
.	O
</s>
<s>
By	O
July	O
2017	O
,	O
the	O
Clue	B-Application
app	O
had	O
more	O
than	O
8	O
million	O
active	O
users	O
on	O
both	O
Android	B-Application
and	O
iOS	B-Application
.	O
</s>
<s>
The	O
company	O
was	O
listed	O
as	O
one	O
of	O
Europe	O
's	O
Hottest	O
Startups	O
in	O
2015	O
by	O
Wired	O
UK	O
,	O
with	O
Clue	B-Application
being	O
named	O
one	O
of	O
the	O
best	O
apps	O
in	O
2015	O
by	O
both	O
Apple	O
and	O
Google	O
.	O
</s>
<s>
The	O
Clue	B-Application
mobile	O
application	O
calculates	O
and	O
predicts	O
a	O
user	O
's	O
period	O
,	O
fertile	O
window	O
,	O
and	O
premenstrual	O
syndrome	O
.	O
</s>
<s>
Clue	B-Application
also	O
partnered	O
with	O
universities	O
such	O
as	O
Stanford	O
University	O
,	O
Columbia	O
University	O
,	O
University	O
of	O
Washington	O
,	O
and	O
University	O
of	O
Oxford	O
to	O
advance	O
female	O
health	O
research	O
.	O
</s>
<s>
Clue	B-Application
integrated	O
with	O
Apple	O
Inc.	O
'	O
s	O
HealthKit	O
for	O
iOS	B-Operating_System
9	I-Operating_System
in	O
September	O
2015	O
,	O
allowing	O
data	O
such	O
as	O
body	O
temperature	O
,	O
cervical	O
mucus	O
quality	O
,	O
menstruation	O
,	O
ovulation	O
test	O
results	O
,	O
sexual	O
activity	O
,	O
and	O
spotting	O
directly	O
to	O
the	O
app	O
.	O
</s>
<s>
In	O
2016	O
,	O
Clue	B-Application
was	O
available	O
in	O
15	O
languages	O
on	O
both	O
iOS	B-Application
and	O
Android	B-Application
.	O
</s>
<s>
That	O
same	O
year	O
,	O
Clue	B-Application
introduced	O
a	O
cycle-sharing	O
feature	O
and	O
in	O
2017	O
a	O
pill-tracking	O
option	O
.	O
</s>
<s>
In	O
February	O
2018	O
,	O
Clue	B-Application
made	O
its	O
app	O
available	O
on	O
the	O
Fitbit	B-Application
Ionic	O
smartwatch	O
.	O
</s>
