Stone Shelf by Ampliora

Privacy Policy

Last updated: June 28, 2026 · Effective date: June 28, 2026

Stone Shelf stores your collection on your device. Photos are sent to our identification service only when you scan a stone — we do not use them for advertising or sell them to third parties.

What this app does

Stone Shelf is a rock and mineral field guide for iPhone. You can photograph a stone to receive an AI-assisted identification, browse educational guides, and save finds to a personal collection on your device.

Data we collect

We do not require an account. We do not use analytics SDKs, advertising frameworks, or third-party crash reporters in the app.

When you use Scan, the app sends your photo (and optional location hint from photo metadata) to our identification API at stone-shelf-api.vercel.app. The image is processed to return an identification result and is not stored long-term by Ampliora for profiling or marketing.

A random device identifier is stored locally in UserDefaults and sent with API requests for rate limiting only. It is not linked to your name, Apple ID, or other personal identity.

Data stored on your device

Stone Shelf stores the following data locally in your device's app container:

  • Saved specimen records (name, category, notes, location, date)
  • Photos you attach to your collection
  • Field notes and verification test results
  • A self-generated anonymous device ID for API rate limiting

Collection data stays on your device unless you delete the app or remove individual finds. We cannot access your saved collection.

Location

If a photo includes GPS metadata, Stone Shelf may derive a coarse place name (for example, city and country) to attach as a field note. Live device location is not tracked. Reverse geocoding uses Apple's on-device services.

Backups

If iCloud Backup is enabled, Apple may include your app data in your encrypted device backup. This is governed by Apple's Privacy Policy. We have no access to your iCloud backup.

In-app purchases

Stone Shelf may offer optional subscriptions in a future update. Purchases would be processed entirely by Apple through the App Store. We would not see your payment details. Apple's handling of payment data is governed by Apple's Privacy Policy.

Children's privacy

Stone Shelf is not directed at children under 13. We do not knowingly collect personal information from children.

Changes to this policy

If we update this policy, the new version will be posted at this URL with an updated effective date.

Contact

Questions about this policy? Reach us at support@ampliora.cc or visit the Support page.