The NZSL Dictionary is an iPhone app developed by David McKee that provides diagrams and videos for over 4,000 English words and phrases in New Zealand Sign Language. The app is free to download and use, and all the diagrams are built into the application so they can be viewed offline. However, to view the videos, an active internet connection is required.

The app comes with a "Word of the Day" feature that introduces you to a new vocabulary word every day. This feature is a great way to learn new words and improve your understanding of New Zealand Sign Language. The dictionary is easy to navigate, and the search function allows you to find words quickly. The videos are well-made and provide clear instructions on how to sign each word.