Consists of lists of words in English, simplified characters, traditional characters and pin yin. You press on the word and hear it pronounced. However, they separate the pronunciation of each character so much, that it is not realistic and souns a bit ridiculous. AND then I paid (in app purchase) to get rid of the ads... but I still see the ads!
bù hão about HSK Level 1 Vocab List - Study for Chinese exams with PinyinTutor.com, v1.4