1.15

• update Facebook SDK #56

1.14

• remove ab test with questions packs discounts #53
• add Branch SDK #54

1.13

• add Questions pack discount A/B test #51

1.12

• add Amplitude analytics #48

1.11

• update assets for PDD course #44
• add notification channel for Android 8+ #45

1.10

• revert app name & graphics back to the TOEFL

1.9

• fix crash on orientation change on the registration screen during active progress dialog

1.8

• add course 8290
• add support for number and string quiz
• add new exp formula
• add purchases and exp synchronization
• add authorization / registration
• reveal real names in leaderboards
• fix old recommendation after course switch

1.7

• add conditional questions packs
• add Proguard (reduce apk size by 30%, get rid of multidex)
• add dependency injection
• rename TOEFL app to English Vocabulary

1.6

• add words bookmarks for TOEFL flavor
• add support for remote push notifications
• add Firebase Remote Config
• add Crashlytics
• add AppMetrica
• A/B test for questions pack specific icon with the badge
• A/B test for questions pack dialog instead of tooltip