암산. 구구단
AndRewApps
수평
NETIGEN Entertainment
암산 게임(수학・두뇌훈련 앱)
Hiza Games
Learn with Dora - 레벨 1
BlueArk
Level Up Xp Booster 1
Espiri Gaming Studios
수학: 암산
NVP
Genius Fax
The Grizzly Labs
Girl Genius
Martena Grodizer
Abacus Mental Math Training
Tiny Monster