| App | Category | Revenue ($M) | Users (M) | Launch Date | |
|---|---|---|---|---|---|
 |
Babbel | Education | 170 | 10 | January, 2008 |
 |
Busuu | Education | 40 | 5 | January, 2008 |
 |
Chegg | Education | 766 | 8.2 | December, 2007 |
 |
Duolingo | Education | 250 | 37 | June, 2012 |
 |
Memrise | Education | 28.8 | 55 | September, 2008 |
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