Elepha is an AI writing assistant that can work across Mac, iPhone, and iPad to save users time on day-to-day writing tasks. It can help streamline the research process, improve the quality of writing, and generate various types of content such as blog posts and social media posts. Elepha uses GPT-3 technology and requires an OpenAI account for maximum functionality. It offers a 30-day free trial and is privacy friendly by respecting user privacy and not storing data on servers.