<s>
TouchPal	B-Device
is	O
an	O
alternative	O
input	B-General_Concept
method	I-General_Concept
for	O
mobile	B-Application
devices	I-Application
,	O
designed	O
and	O
developed	O
by	O
Shanghai-based	O
CooTek	O
.	O
</s>
<s>
It	O
is	O
a	O
software	B-Application
application	I-Application
running	O
on	O
multiple	O
platforms	B-Device
,	O
including	O
Android	O
,	O
iOS	B-Application
(	O
no	O
longer	O
supported	O
,	O
only	O
maintained	O
)	O
,	O
Windows	B-Operating_System
Mobile	I-Operating_System
,	O
and	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
It	O
simulates	O
a	O
keyboard	B-Device
on	O
the	O
screen	O
of	O
the	O
device	O
,	O
which	O
is	O
used	O
to	O
enter	O
text	O
by	O
tapping	O
on	O
the	O
screen	O
or	O
sliding	O
a	O
finger	O
between	O
letters	O
constructing	O
the	O
word	O
.	O
</s>
<s>
It	O
is	O
an	O
optional	O
text	O
input	B-General_Concept
method	I-General_Concept
to	O
the	O
traditional	O
physical	B-Device
keyboards	I-Device
and	O
default	O
keyboards	B-Device
provided	O
by	O
the	O
device	O
manufacturer	O
.	O
</s>
<s>
TouchPal	B-Device
default	O
keyboard	B-Device
layout	O
is	O
designed	O
based	O
on	O
the	O
"	O
T+	O
"	O
technology	O
that	O
combines	O
two	O
letters	O
and	O
one	O
symbol	O
on	O
each	O
key	O
,	O
whose	O
layout	O
looks	O
like	O
a	O
T	O
.	O
The	O
overall	O
layout	O
of	O
all	O
the	O
letters	O
follows	O
a	O
common	O
computer	B-Device
keyboard	I-Device
layout	O
,	O
which	O
is	O
the	O
QWERTY	O
layout	O
.	O
</s>
<s>
In	O
June	O
2019	O
,	O
it	O
was	O
revealed	O
that	O
CooTek	O
,	O
the	O
developer	O
of	O
TouchPal	B-Device
was	O
bundling	O
malicious	O
adware	O
with	O
its	O
keyboard	B-Device
software	O
,	O
and	O
taking	O
steps	O
to	O
conceal	O
its	O
involvement	O
.	O
</s>
<s>
Google	B-Application
subsequently	O
banned	O
CooTek	O
from	O
the	B-Application
Google	I-Application
Play	O
Store	O
.	O
</s>
<s>
TouchPal	B-Device
v1	O
was	O
released	O
in	O
October	O
2007	O
.	O
</s>
<s>
It	O
only	O
provides	O
the	O
T+	O
layout	O
virtual	B-Device
keyboard	I-Device
with	O
one-layer	O
design	O
.	O
</s>
<s>
TouchPal	B-Device
v2	O
comes	O
out	O
in	O
late	O
December	O
2007	O
.	O
</s>
<s>
Apart	O
from	O
what	O
the	O
v1	O
has	O
to	O
offer	O
,	O
its	O
virtual	B-Device
keyboard	I-Device
is	O
resizable	O
by	O
finger	O
sliding	O
.	O
</s>
<s>
TouchPal	B-Device
v3	O
English	O
version	O
is	O
released	O
in	O
April	O
2008	O
,	O
together	O
with	O
extra	O
European	O
input	O
languages	O
.	O
</s>
<s>
TouchPal	B-Device
v3	O
Chinese	O
input	O
version	O
comes	O
out	O
one	O
month	O
later	O
.	O
</s>
<s>
Compared	O
with	O
the	O
previous	O
two	O
versions	O
,	O
TouchPal	B-Device
v3	O
has	O
a	O
lot	O
of	O
new	O
features	O
.	O
</s>
<s>
It	O
supports	O
three	O
layouts	O
on	O
one	O
virtual	B-Device
keyboard	I-Device
:	O
the	O
T+	O
layout	O
,	O
the	O
full	O
QWERTY	O
layout	O
,	O
and	O
the	O
9-key	O
PhonePad	O
layout	O
.	O
</s>
<s>
Users	O
can	O
switch	O
keyboard	B-Device
layouts	O
by	O
finger	O
sweeping	O
.	O
</s>
<s>
TouchPal	B-Device
v3	O
significantly	O
improves	O
the	O
predictive	O
algorithm	O
by	O
incorporating	O
its	O
patent	O
pending	O
context-based	O
word	O
prediction	O
and	O
mistyping	O
auto-correction	O
algorithm	O
.	O
</s>
<s>
With	O
its	O
SDK	O
,	O
users	O
can	O
self	O
develop	O
the	O
supported	O
input	O
languages	O
,	O
the	O
skins	O
,	O
and	O
change	O
the	O
keyboard	B-Device
layout	O
.	O
</s>
<s>
In	O
November	O
2008	O
,	O
CooTek	O
starts	O
to	O
release	O
TouchPal	B-Device
for	O
Android	O
devices	O
with	O
its	O
initial	O
version	O
(	O
v4	O
)	O
mainly	O
shipped	O
for	O
manufacturer	O
.	O
</s>
<s>
Five	O
months	O
later	O
,	O
in	O
April	O
2009	O
,	O
CooTek	O
launches	O
the	O
official	O
public	O
release	O
of	O
TouchPal	B-Device
v4.2	O
.	O
</s>
<s>
Almost	O
two	O
years	O
later	O
,	O
in	O
June	O
2011	O
,	O
TouchPal	B-Device
Curve	O
v4.7.6	O
is	O
unveiled	O
.	O
</s>
<s>
In	O
September	O
2011	O
,	O
CooTek	O
launches	O
TouchPal	B-Device
v5.0	O
with	O
milestone	O
upgrading	O
.	O
</s>
<s>
In	O
September	O
2013	O
,	O
TouchPal	B-Device
X	O
v	O
5.4.5	O
comes	O
out	O
with	O
various	O
added	O
features	O
such	O
as	O
TouchPal	B-Device
Wave	O
,	O
TouchPal	B-Device
Curve®	O
,	O
Symbol	O
and	O
Number	O
quick	O
input	O
,	O
Emoji	O
X	O
,	O
Contextual	O
prediction	O
and	O
Walkie-Talkie	O
style	O
voice	O
input	O
.	O
</s>
