NGSL Builder is an iPhone application designed to assist both learners and teachers in utilizing the New General Service List (NGSL), one of the most essential vocabulary word lists for second language learners of English. Developed by EFL Technologies K.K., this app provides a range of features to enhance vocabulary learning.

The app offers simple tools for downloading, emailing, and organizing the NGSL, making it convenient to access and study the wordlist. Additionally, NGSL Builder provides science-based study tools that facilitate efficient learning. Users can keep detailed records of their progress and even email their progress to themselves or their teachers.

One notable feature of NGSL Builder is the inclusion of original definitions written in simple English. Furthermore, each word is accompanied by a professional voice talent, a native speaker of North American English, providing accurate pronunciation.

NGSL Builder also includes an Intelligent Wordlist Maker and Intelligent Flashcard system. The Wordlist Maker allows users to select only the words they need to study, guiding them through the list by frequency bands. This approach ensures efficient and targeted learning. The Intelligent Flashcard system utilizes spaced repetition, a scientifically proven technique, to help users review words multiple times over the course of a month. This system focuses on words that present difficulties for the learner, providing extra practice and reinforcement.

NGSL Builder is an invaluable tool for English language learners and teachers alike. It harnesses the power of the NGSL wordlist and offers efficient study tools to enhance vocabulary acquisition. Whether you are a beginner or an advanced learner, this app is a must-have for expanding your English language skills.