Privacy Policy
Effective 25 October 2026
The Thucydides Atlas collects no personal data. It does not connect to the internet, and nothing you do in it leaves your device unless you choose to share a file.
What the app does not do
- It has no accounts and asks for no sign-in, name, email or password.
- It contains no analytics, tracking, advertising or third-party SDKs.
- It makes no network connections. On the Mac, the app runs in Apple's App Sandbox without permission to use the network at all.
- It does not use your location, contacts, photos, camera or microphone.
What stays on your device
To remember where you are, the Atlas keeps a few things in its own storage on your iPad or Mac:
- your reading position, bookmarks and the chapters you have read;
- the notes you write, and any note files you import;
- the names you give to reader profiles on the device;
- your settings, such as text size and sound volume.
None of this is sent to us or to anyone else. On the iPad, deleting the app deletes it; on the Mac, it stays in the app's own container in your Library folder until you remove that too. If you back up your device to iCloud or to a computer, Apple's backup includes this data as it would for any app.
Files you share
You can export your notes as a file. The file goes only where you send it: a folder you pick, the Files app, or a person you share it with. A note file you open from someone else is read on your device and is not sent anywhere.
Apple
The App Store and TestFlight are run by Apple. If you choose to share diagnostics with app developers in your device's settings, or send feedback or a crash report through TestFlight, Apple may pass that information to us. It is handled under Apple's Privacy Policy, and we use it only to fix problems in the app.
Children
The Atlas collects no personal information from anyone, including children.
Changes
If this policy changes, the new version will be posted on this page with a new effective date. A change that would collect any data would be stated here before it reached the app.
Contact
Questions about this policy: hello@wundercog.com