The Princeton Review and Modality Inc. have released The Princeton Review's Vocab Challenge for the iPhone and the iPod touch. The application measures a user's knowledge of 250 words which are frequently included in SAT examinations. The app features four types of timed challenges with questions relating to positive or negative connotations, synonyms, antonyms and definitions.
The application utilizes the Multi-Touch interface, enabling users to quickly select answers by swiping the screen or shaking the device. Performance is tracked, with a display of showing mastered terms. An index of the words is also included, with definitions, audio pronunciations and a section of speech that includes the word.
The Princeton Review's Vocab Challenge is available through the App Store for $5.