— StarBridge Book Studio
App privacy notice.
Effective 28 October 2026 · Applies to StarBridge Book Studio 1.0.2026 and later (Mac App Store and direct download).
The short version
StarBridge Book Studio does not collect your personal data. There are no accounts, no advertising, no analytics and no tracking. Your books, pictures, recordings and settings stay on your Mac. We cannot see them, and nothing is sent to us.
Who is responsible
Justin Marshall-Cutts trading as StarBridge Media, StarBridge Media Studios 2026, 8 Retford Grove, Hartlepool, Cleveland, TS25 2NP, United Kingdom. Email: authors@starbridge.media. Website: https://starbridge.media.
What stays on your Mac
Your books, manuscripts, artwork, recordings, podcast scripts, recovery snapshots and preferences are stored in this Mac's application support folders, and in locations you choose when you export. A voice recording you import as a reference stays on your Mac as a local file, together with any backup of a replaced reference. An optional display name you type is stored only on your Mac. The built-in Kokoro voice runs entirely on your Mac and needs no internet connection.
What we do not collect
We do not collect your name, email address, contact details, location, device identifiers, usage data, diagnostics or crash reports. The app contains no third-party analytics, advertising or tracking software. Because we hold none of your data, there is nothing for us to share, sell or delete. The Mac App Store edition declares "Data not collected" in its App Privacy details.
Online services you choose to use
Some optional features connect to a provider you choose, with your own account and API key, for example ElevenLabs (voices), OpenAI or Anthropic (AI assistance). These connections happen only when you start the action. The text or context you choose to send, and the request details the provider needs, go directly from your Mac to that provider. We never receive or see them. Your API keys are stored in the macOS Keychain and are never included in your project files or exports. Each provider has its own privacy policy and retention practices, so please read them before sending confidential material. Optional local tools such as Ollama run on your Mac and your requests stay on it.
Downloads you choose to make
If you choose to download optional voice or writing models, the download comes from that provider's server (for example Hugging Face), and their privacy policy applies to that download. The Mac App Store edition does not download or run extra code.
Support emails
If you email authors@starbridge.media, or use Send feedback in Help (which prepares an email draft that you review before sending), we receive what you send, including your email address, and use it only to reply and to improve the app. We keep it only as long as needed for that purpose, and you can ask us to delete it at any time.
Children
StarBridge Book Studio is a general writing and publishing tool and is not directed at children under 13. It collects no data from anyone.
Your rights
Because we do not hold your personal data, there is normally nothing to access or erase. For anything we do hold (such as an email you sent us) you have the rights set out in UK data-protection law, including access, correction, erasure and the right to complain to the Information Commissioner's Office (ico.org.uk). Contact authors@starbridge.media.
Changes
If this notice changes, we will update it here and in the app before the change takes effect. A change that collects data would also change the App Store privacy details and require a new version of the app.