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Privacy Policy

Myrlin (“Myrlin”, “the app”)

Effective date: 2026-06-25

This policy explains how Myrlin: Indie Writer handles your information. It applies to both the Stable and Preview versions of the app for Windows.

The short version

Myrlin is a local-first, offline desktop writing app. It has no user accounts and no servers. The developer does not collect, receive, transmit, sell, or share any of your data. Everything you write and every setting you change stays on your own computer unless you deliberately choose to move it somewhere yourself.

What Myrlin stores, and where

All of your content and settings are stored locally in the app’s own storage on your device. Myrlin never sends this anywhere. This includes, for example:

  • Your manuscript text, documents, and chapters
  • Titles, subtitles, and publication metadata, plus cover and publisher-logo images you add
  • Noteboard notes, drawings, and pinned notes
  • Outline planning notes
  • Writing statistics: daily and total word counts, sprint history, goals, quests, and experience
  • Custom export themes
  • App preferences such as theme, fonts, text sizes, sound, notifications, and smart quotes

This data lives on your computer. The developer of Myrlin never receives any of it.

Network use — there is none by the app

Myrlin does not make network requests. It has:

  • No backend or cloud service of its own
  • No analytics, telemetry, or usage tracking
  • No automatic crash or error reporting
  • No advertising
  • No remotely loaded fonts (all fonts are bundled inside the app)

Features that might seem like they need the internet do not. For example, PDF export runs a renderer that is bundled with the app and works entirely on your computer.

The Home folder (“Home sync”)

Myrlin lets you choose a Home — a folder on your computer where the app keeps a readable copy of your data as ordinary files. When you use a Home, Myrlin only reads and writes files in that folder through your computer’s normal file system. Myrlin itself does not connect to the internet to do this, and it does not sync anything across devices.

If you want your work to appear on more than one computer, you can choose a Home folder that is already managed by a cloud-sync program you use — for example Dropbox, Google Drive, OneDrive, or a similar client. In that case, that separate program is what moves the files between your devices over the internet. Myrlin does not perform, see, or control that transfer.

This means: when your files travel across the internet via a cloud-sync folder, that activity is governed by your chosen provider’s own privacy policy and your account with them, not by Myrlin. Choosing where your Home folder lives, and which sync service (if any) manages it, is entirely up to you.

Disconnecting a Home in Myrlin’s Settings stops the app from using that folder; it does not delete the files already saved there.

Backups

Myrlin can save backup copies of your data as timestamped archive files. These are written to the app’s local data directory or, if you have set up a Home, to a Backups folder inside it. A limited number of the most recent backups are kept. You can also manually export and import your data as a file from Settings. All of this stays on your computer or in the folder you chose — nothing is uploaded by the app.

Diagnostic reports

If something goes wrong, Myrlin can help you create a diagnostic report — but only when you ask it to. These reports are designed to protect your privacy:

  • They are created only at your request and are never sent anywhere automatically.
  • They are saved only to a location you choose on your computer.
  • They deliberately exclude your manuscript text, the names of your projects or documents, file names, full file paths, images, fonts, personal identifiers, and technical stack traces.
  • They include only coarse technical facts (such as your Windows version and whether key components are available) and a high-level summary of backup and Home status.

Nothing about a diagnostic report is stored long-term or transmitted by Myrlin.

You can add web or email links inside your documents and notes. When you open such a link, Myrlin hands it to your operating system, which opens it in your default browser or mail app. What happens after that is between you and that website or service.

App distribution and updates

The Stable version of Myrlin is distributed and updated through the Microsoft Store. The store download, installation, and update process is handled by Microsoft and is subject to Microsoft’s own privacy practices, not Myrlin’s. Myrlin contains no built-in updater and sends no update or usage information of its own. The Preview version is distributed outside the Microsoft Store.

Your control over your data

Because everything stays on your device, you are fully in control:

  • Export, import, back up, and restore your data from Settings.
  • Reset Myrlin’s local data from Settings to clear it.
  • Uninstall the app, and delete your Home folder and any backups, to remove your copies.

There is no developer-held server copy of your data to request, correct, or delete — because none is ever collected.

Children’s privacy

Myrlin does not collect personal information from anyone, including children. All data stays local to the device.

Changes to this policy

If this policy changes, the updated version will replace this document and the effective date above will be updated.

Contact

Questions about this policy can be sent to:

William Myrl — myrlininfo@williammyrl.com