MDit

MDit is an agentic narrative editor: a document editor where you and an AI agent keep the context of many documents connected as you write. The more writing you hand to AI, the less of each document you actually read. A change made in one doc stays as it was in the others, and the project slowly drifts out of sync. MDit started from those two problems. It reads your documents with you, points out where they disagree, and suggests fixes that you choose to apply. And it makes that writing sound like you. Build your voice through an interview - Pick what you're writing: work documents, product copy, fiction and worldbuilding, blogs and essays, meeting notes, or academic papers. - Rate sentences from ChatGPT as dislike, neutral, or like, and note what you disliked if you want. - Revise an awkward paragraph yourself, and MDit learns your writing habits from the edits. - Check sentences written in the new voice, then save it. - You don't need any existing writing. If you have some, you can let the interview refer to it. - Assign saved voices to document types such as PRDs, policies, FAQs, and meeting notes. Chat writing and proofreading follow them. Find where documents disagree, and review fixes as suggestions - Mark decisions in your documents (prices, periods, dates), and MDit tells you when another document states a different value. Compare the two passages side by side. - Ask ChatGPT to find conflicts across a project or selected documents, and see each conflicting pair of passages as a card. - Fixes for a changed decision arrive as proposed changes. See exactly what changes, then apply, exclude, or ask for a rewrite, one at a time. Applied changes can be undone. - Each decision keeps its change history and supporting documents. Chat that reads your documents - Ask a question and it reads the scope you choose (this section, this document, or a project) and answers with sources. - Ask it to write, and it proposes a new document or changes to the current one. Draft the next document from the decisions and to-dos in your meeting notes. - On Mac, connect an AI agent running on the same computer over MCP to read documents and send proposed changes. You choose what to apply in MDit. Capture and organize - Record a meeting on iPhone, and MDit finds decisions, questions, and to-dos in the transcript and saves meeting notes. - Jot down a quick note, and MDit suggests the document and section where it belongs. - Documents stay plain Markdown files in iCloud Drive or on your device, so other apps can open them. - Works on iPhone, iPad, and Mac. AI connection and terms - MDit is free. - AI features currently connect to ChatGPT. Sign in with your ChatGPT account, and AI usage follows the terms and limits of your plan. MDit does not sell AI credits. - When you ask a question or hand off writing, the selected document content and your question are sent to OpenAI. - Without ChatGPT you can still write documents, mark decisions and see where values differ, and organize notes. The voice interview, chat, and proposed changes require a ChatGPT connection.