CorpusKit Studio is designed to be private by default. The app collects no personal data, has no user accounts, includes no analytics or tracking, and makes no network requests during normal use. Everything you do stays on your device.
The short version
- We do not collect, transmit, sell, or share any of your data.
- Your documents, and everything the app derives from them, never leave your device.
- There is no account to create and no sign-in.
- There are no analytics, advertising, or third-party tracking SDKs in the app.
What the app handles, and where it stays
CorpusKit Studio turns PDF and EPUB documents into searchable corpora. All of this happens on your device (iPhone, iPad, or Mac):
- Documents you import (PDFs and EPUBs) are read locally to extract text and detect chapters.
- Chunks and embeddings — the passages and numeric vectors generated from your text — are produced on-device by a bundled machine-learning model (arctic-embed-m-v1.5). No text is sent anywhere to do this.
- Your project files (text, metadata, chapter maps, highlights, evaluations, and exported
.corpusbundles) are stored in the app's sandboxed storage on your device, or in a folder you explicitly choose. - App settings (such as your curator name and appearance preference) are stored locally on your device using the system preferences store.
We never receive any of this. It is not uploaded, backed up to us, or transmitted off your device by the app.
Network use
The app itself makes no network connections to provide its features — importing, chunking, embedding, searching, evaluating, and exporting all work fully offline.
The only outward-facing elements are optional links (for example, a “Help getting started” link). Tapping one opens the page in your web browser. At that point you are on a website, subject to your browser's and that website's own terms and privacy practices. The app does not send any of your documents or data along with such a link.
Purchases
CorpusKit Studio is a paid app. Purchases are handled entirely by Apple through the App Store. We do not process or receive your payment details. Apple's handling of purchases is governed by Apple's Privacy Policy.
Diagnostics
The app contains no analytics or crash-reporting of its own. If you have opted in to sharing diagnostics with developers in your device's system settings, Apple may provide us with aggregated, anonymized crash and usage statistics through App Store Connect. This is controlled by you in your device's Settings → Privacy & Security → Analytics & Improvements and is governed by Apple's privacy terms, not ours.
Your control over your data
- Delete a project at any time from within the app, or remove the app to remove its data.
- “Delete Stored Data” in Settings removes the app's projects from its storage.
- Exported
.corpusbundles are ordinary files you own and can move, share, or delete yourself.
Third-party components
The app includes open-source components (for example, SwiftSoup for EPUB parsing and ZIPFoundation for reading and writing bundles) and a bundled embedding model. These run locally on your device and do not transmit your data. They are credited in the app's Licenses screen.
Children's privacy
CorpusKit Studio is rated 4+ and collects no data from anyone, including children.
Changes to this policy
If this policy changes, we will update the date at the top of this page. Because the app collects no data, any changes are expected to be clarifications rather than changes to what we collect (which is nothing).
Contact
Questions about privacy? Email support@robroy.online.