HollowGeometry Privacy Policy
Effective date: November 1, 2026
HollowGeometry is built to work entirely on your device. This policy explains what that means in practice.
What the app collects
HollowGeometry collects nothing about you. It has no account, no sign in, no analytics, no advertising and no tracking, and it never connects to a server.
Permissions
The app asks for no permissions. It does not use the camera, the microphone, your photos, your location, your contacts or health data.
Where your data is stored
Your blueprint sheets are saved as small text files in the app's own storage on this device. Your optional name and drafting mark, the monuments you have studied, the features you have explored and the experiment runs you recorded are kept in the app's settings storage. Both are part of your usual device backup. The catalogue of monuments is built into the app.
Third parties
The app shares nothing with anyone. No outside service receives any of your information.
How long data is kept and how to delete it
Your data stays on the device until you remove it. Reset progress in Settings clears your studied monuments, explored features and recorded runs. Each sheet can be deleted from Blueprints. Deleting the app removes everything it stored.
Children
The app does not knowingly collect information from anyone, including children under 13, because it collects no information at all.
This website
The marketing website loads its fonts from Google Fonts, so Google receives your IP address and browser details when you open a page, as with any web font. The contact form on the home page is a visual demonstration only: it sends nothing, stores nothing and no message leaves your browser. If you email us directly, we use your address and message only to reply to you.
If you download the app, Apple may provide us with aggregated, anonymous App Store statistics if you have opted in to share them. These contain no personal information and cannot identify you.
Changes to this policy
If this policy changes, the new version will appear on this page and in the app with a new effective date.
Contact
Questions about privacy? Write to info@fruitdrops.click.