<s>
Tandem	B-Application
is	O
a	O
language	O
exchange	O
app	O
on	O
iOS	B-Application
and	O
Android	B-Application
that	O
connects	O
language	O
learners	O
with	O
native	O
speakers	O
.	O
</s>
<s>
Tandem	B-Application
was	O
founded	O
in	O
Hannover	O
in	O
2014	O
by	O
Arnd	O
Aschentrup	O
,	O
Tobias	O
Dickmeis	O
,	O
and	O
Matthias	O
Kleimann	O
.	O
</s>
<s>
Now	O
headquartered	O
in	O
Berlin	O
,	O
Tandem	B-Application
launched	O
its	O
mobile	O
app	O
on	O
iOS	B-Application
in	O
2015	O
,	O
followed	O
by	O
Android	B-Application
in	O
2016	O
.	O
</s>
<s>
Prior	O
to	O
Tandem	B-Application
,	O
Aschentrup	O
,	O
Dickmeis	O
,	O
and	O
Kleimann	O
founded	O
Vive	O
,	O
a	O
members-only	O
mobile	O
video	O
chat	O
community	O
.	O
</s>
<s>
In	O
2015	O
,	O
Tandem	B-Application
closed	O
a	O
seed	O
round	O
of	O
€	O
600,000	O
from	O
angel	O
investors	O
,	O
including	O
Atlantic	O
Labs	O
(	O
Christophe	O
Maire	O
)	O
,	O
Hannover	O
Beteiligungsfonds	O
,	O
Marcus	O
Englert	O
(	O
Chairman	O
Rocket	O
Internet	O
)	O
,	O
Catagonia	O
,	O
Ludwig	O
zu	O
Salm	O
,	O
Florian	O
Langenscheidt	O
,	O
Heiko	O
Hubertz	O
,	O
Martin	O
Sinner	O
,	O
and	O
Zehden	O
Enterprises	O
.	O
</s>
<s>
In	O
2018	O
,	O
Tandem	B-Application
introduced	O
Tandem	B-Application
Pro	O
,	O
a	O
subscription-based	O
offering	O
to	O
access	O
all	O
the	O
language	O
learning	O
features	O
available	O
on	O
the	O
app	O
.	O
</s>
<s>
In	O
July	O
2020	O
,	O
Tandem	B-Application
closed	O
a	O
€5	O
million	O
(	O
~	O
$5.7	O
million	O
)	O
Series	O
A	O
funding	O
round	O
led	O
by	O
Brighteye	O
Ventures	O
,	O
a	O
European	O
education	O
technology	O
fund	O
-	O
along	O
with	O
Trind	O
Ventures	O
,	O
Rubylight	O
Limited	O
,	O
and	O
GPS	O
Ventures	O
.	O
</s>
<s>
The	O
Tandem	B-Application
app	O
and	O
its	O
name	O
were	O
inspired	O
by	O
Tandem	B-Application
language	O
learning	O
,	O
a	O
method	O
of	O
learning	O
a	O
language	O
through	O
language	O
exchange	O
.	O
</s>
<s>
In	O
a	O
or	O
a	O
tandem	B-Application
,	O
each	O
person	O
is	O
a	O
native	O
speaker	O
of	O
the	O
language	O
the	O
other	O
person	O
wants	O
to	O
learn	O
.	O
</s>
<s>
The	O
Tandem	B-Application
app	O
is	O
supported	O
by	O
Tandem	B-Application
Fundazioa	O
,	O
the	O
organization	O
that	O
developed	O
the	O
tandem	B-Application
language	O
learning	O
method	O
.	O
</s>
<s>
Tandem	B-Application
requires	O
its	O
members	O
to	O
submit	O
an	O
application	O
before	O
being	O
accepted	O
into	O
the	O
Tandem	B-Application
community	O
.	O
</s>
<s>
As	O
part	O
of	O
Tandem	B-Application
’s	O
moderation	O
policy	O
,	O
each	O
application	O
is	O
individually	O
reviewed	O
.	O
</s>
<s>
Once	O
accepted	O
,	O
Tandem	B-Application
presents	O
its	O
members	O
with	O
a	O
stream	O
of	O
potential	O
Tandem	B-Application
partners	O
who	O
are	O
native	O
speakers	O
in	O
the	O
language	O
they	O
want	O
to	O
learn	O
.	O
</s>
<s>
Members	O
can	O
then	O
chat	O
with	O
their	O
Tandem	B-Application
partners	O
via	O
instant	O
messaging	O
,	O
voice	O
messages	O
,	O
audio	O
calls	O
,	O
and	O
video	O
calls	O
.	O
</s>
<s>
In	O
2015	O
,	O
Tandem	B-Application
was	O
named	O
in	O
Apple	O
’s	O
“	O
Best	O
Apps	O
of	O
2015	O
”	O
.	O
</s>
<s>
Tandem	B-Application
was	O
also	O
recognized	O
as	O
one	O
of	O
Google	O
Play	O
’s	O
“	O
Best	O
Apps	O
of	O
2017	O
”	O
.	O
</s>
<s>
In	O
2018	O
,	O
Tandem	B-Application
received	O
an	O
award	O
from	O
the	O
German	O
initiative	O
Deutschland	O
-	O
Land	O
der	O
Ideen	O
in	O
their	O
“	O
Ausgezeichnete	O
Orte	O
im	O
Land	O
der	O
Ideen	O
”	O
competition	O
.	O
</s>
<s>
Tandem	B-Application
has	O
received	O
criticism	O
for	O
not	O
accepting	O
members	O
into	O
the	O
community	O
immediately	O
.	O
</s>
<s>
On	O
the	O
other	O
end	O
,	O
users	O
have	O
noticed	O
Tandem	B-Application
does	O
not	O
let	O
its	O
users	O
sign	O
in	O
if	O
they	O
never	O
signed	O
out	O
before	O
exiting	O
the	O
app	O
.	O
</s>
<s>
There	O
are	O
300	O
languages	O
available	O
to	O
learn	O
on	O
Tandem	B-Application
.	O
</s>
