Sic. is a standalone dictionary app for iOS written with React Native. The dictionary app in OS X is good and this is a quick attempt to emulate it.
iOS has an on-disk (or something) dictionary but doesn't expose it for standalone apps. Wrapping that API/View in a React component didn't prove very useful anyway.
This uses https://www.wordsapi.com, which requires an API key. You can set this in Dictionary.js
with API_KEY
.