Last updated: June 2026
kudowrite is a personal fiction-writing tool. This policy explains what data the app handles, where it lives, and what we share with third parties — which is essentially nothing we collect ourselves.
kudowrite does not operate a server and does not collect or store any personal data on behalf of its developers. Everything stays either in your browser or in services you have explicitly authorised.
All project content (chapters, sections, your story bible, voice settings) is stored in two places you control:
kudowrite/state.json) in your Drive. Only you have access to this file; the app requests the narrow drive.file scope, which limits it to files it creates itself.kudowrite uses Google's OAuth 2.0 / Identity Services (client-side) to sign you in. When you sign in, Google provides your name, email address, and profile picture. These are displayed in the app interface and are not transmitted to or stored by any kudowrite server.
Your use of Google Sign-In and Google Drive is subject to Google's Privacy Policy.
kudowrite's AI features (Rewrite, Expand, Generate) are powered by OpenRouter. You provide your own OpenRouter API key. The key is stored only in your browser's localStorage and is sent directly from your browser to openrouter.ai when you use an AI feature. It is never sent to or stored by kudowrite.
Your use of OpenRouter is subject to OpenRouter's Privacy Policy.
kudowrite does not use any analytics service, tracking cookies, or advertising technology. No usage data is collected.
kudowrite is not intended for users under the age of 18 and contains content suitable for adults only. If you are under 18, please do not use this application.
If this policy changes materially, the "Last updated" date above will be updated. Continued use of the app after any change constitutes acceptance of the revised policy.
Questions about this policy can be directed to [email protected].