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Mobile World
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photo
Tags
apps
business
duolingo
mobile
tiny cards
What
android
app
available
based
1
×
better
1
×
boosting
company
courses
duolingo
essentially
funded
heavily
introduced
ios
1
×
known
language
launch
launched
1
×
launches
learning
make
memorization
memory
millions
online
people
pittsburgh
range
ready
standalone
startup
1
×
summer
tinycards
Language
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startup
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launched
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ios
×
based
×
better
×
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