Hiwriter is an AI-powered tool designed to enhance email exchange processes in Gmail. It utilizes the advanced GPT-3.5 model, focusing on the creation of clear, on-target emails in a short period without straining the user's mental capacity.

With Hiwriter, users can quickly draft appropriate emails and responses, taking into account specific details that help to make the email contextually appropriate and concise.

The tool provides several noteworthy features, starting with automatic email generation using OpenAI's GPT-3.5.

It enables personalization of emails based on input details about the sender, the recipient and the subject of discussion.

Further, it offers an email reply generator that uses the ongoing email thread's context to craft appropriate responses.

Moreover, it equips users with a style and tone selector to create emails that emulate the user's unique writing style.

It also features a translation function, useful for composing and translating emails into different languages for broader communication possibilities.

Additionally, users can edit generated drafts to fit their preferences better.

Although free to use, Hiwriter also provides an upcoming 'improve feature' that proposes enhanced versions of drafted emails, including improved vocabulary, sentence structure, and clarity.

It caters to mobility and versatility with its optimization for mobile devices and multi-language support.

With all these features, Hiwriter aims to simplify the task of writing emails for both businesses and individuals, regardless of their language preference.