- android.permission.ACCESS_NETWORK_STATE
- android.permission.INTERNET
- com.android.vending.BILLING
- android.permission.WAKE_LOCK
- com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
7/8/2019
No annoying ads.
Works without Internet.
Small size compared with similar applications.
Contains more elements than our app (Spelling Learning).