Wordbuilding Practice is an iPhone application designed to enhance English vocabulary through word formation exercises. The app offers users the opportunity to practice constructing words based on given hints, aimed at improving word-building skills. With four levels - beginner, intermediate, upper-intermediate, and advanced - each consisting of 125 sentences, learners can tailor their practice to their proficiency level.

Additionally, users can opt for a placement test to determine their current proficiency level if unsure where to start. The app features daily reminders to help users stay consistent with their practice. Utilizing the Leitner system, a proven method for effective vocabulary learning, Wordbuilding Practice provides a structured and efficient way to expand vocabulary.