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 |