新特性Version 8.4: 2000 commonly used sentences in Polishv8.3.2: 975 commonly used expressions in Polishv6.3: - Improve the search feature- Fix data error- Support sentence translation in native languagesv6.2: Improve quiz: Smarter quiz optionsv6.1: Hot-fix: Can not play audio issue on Android 10.v6.0:- Allow listening & practice selected groups.- New stunning theme colors