Duolingo
Studio with 3 titles on Google Play and 1B installs in total.
Website: duolingo.com
3Apps
3Live now
1BTotal installs
3.83Average rating
May 29, 2013First release
Apps
Duolingo: Learn Languages
5M+ installs★ 4.8EducationLearn to Read - Duolingo ABC
1M+ installs★ 3.9EducationDuolingo English Test (DET)
5K+ installs★ 2.9Education
Developer contact details (email, phone, address) are available through the API on the Business plan.