Prism Foundry Privacy Policy
Effective October 23, 2026
Prism Foundry is a stained-glass block puzzle you play on your own iPhone. It has no account, no ads, no in-app purchases and no tracking. Here is what passes through the kiln.
The board and your progress
Scores, the current board, your Pane Gallery titles, the glazier's mood and the touch layout of the play area are saved in the app's own storage on your device. The game itself runs from files packaged inside the app; it does not download levels or code.
A photo turned into a veil
If you choose a photo, or take a still with the camera, Prism Foundry shrinks it into an 8×8 grid of colours. That grid becomes the hidden veil that your line clears reveal. A copy of the image and the colour grid are kept on your device so the finished pane can show it. To list your photos the app asks for photo library access; you can grant limited access and pick only certain photos. Camera frames are used only for the still you capture. Nothing is uploaded.
Your breath at the bellows
When you tap the bellows, the app listens through the microphone for a few seconds and measures only how loud the sound is, to decide your score multiplier. The short recording is written to a temporary file and deleted immediately after. It is never stored, played back, or sent anywhere.
Panes you save to Photos
Tapping Save to Photos adds the finished pane image to your library. For this the app asks for add-only access, which cannot read your existing photos.
Vitre, the glazier
Vitre's comments come from lines built into the app and work without a connection. The app contains an optional "Cloud Kiln" setting that, only if you choose Allow, could send a short summary of the game (score, board state, the veil's colour values and number of panes, never the photo itself) to an AI language service for advice, and Vitre's line text to a speech service to read it aloud. You can keep it on Stay Offline and the game plays the same. If it is enabled, those providers process the text under their own policies, possibly outside your country.
What we do not do
We do not collect your name, email, contacts, location, advertising identifier or device identifiers. We do not sell data, show ads, or share data with data brokers. Prism Foundry does not track you across other companies' apps or websites.
Keeping or removing your data
Everything stays on your device. You can delete any pane in the Pane Gallery, which removes its pane and veil images. Deleting the app removes all of its stored data. You can change camera, microphone and photo access at any time in iOS Settings.
Children
Prism Foundry is a general-audience puzzle game and does not knowingly collect personal information from children.
Changes and contact
If this policy changes, the new version will be posted on this page with a new date. Questions: glazier.vitre@prismfoundrykiln.com