Yijing Fortune Teller (易經算命仙) · Effective date: August 11, 2026
In one sentence: This app requires no account and collects no personally identifiable information. Your divination history and charm collection stay on your device.
1. What we do not collect
The app has no account system and never asks for or collects:
Name, date of birth, email address, phone number, or postal address
Contacts, photo library contents, calendars, or health data
Precise location (GPS)
The questions you have in mind, or any free-form text
2. Data stored only on your device (never uploaded)
The following is kept in local storage (UserDefaults) on your device and is not readable by us:
Divination history (hexagram number, chosen topic, timestamp)
Deleting the app erases all of the above permanently. None of it syncs to iCloud or to other devices.
3. The only data uploaded: anonymous ranking counters
The "Divination Ranking" feature increments a counter for the chosen topic in Google Firebase Realtime Database. Only the topic counter is transmitted — not the resulting hexagram, timestamp, device model, or any identifier.
To satisfy the database's write rules, the app signs in anonymously via Firebase, which produces a random, meaningless anonymous identifier. It is not linked to any personal data and is not used to identify or track you.
4. Advertising
The app displays ads through Google AdMob to remain free of charge:
All ad requests are made as non-personalized ads. Ads are not targeted using an interest profile.
The app performs no cross-app or cross-site tracking. It therefore never shows an App Tracking Transparency (ATT) prompt and does not use the IDFA for tracking.
Google may still process technical information such as device identifiers and IP address (which can indicate an approximate country or region) for ad delivery, frequency capping, and fraud prevention. That processing is governed by Google's privacy policy: policies.google.com/privacy.
5. Photo library permission
The app requests "Add Photos" permission only when you tap "Save to device" to export a share card. This permission is write-only; the app cannot read or browse any photo in your library.
6. Sharing to other apps
When you share to Instagram, Facebook, or another app, you leave this app and that platform's own privacy policy applies. We pass along the image only, and no other data.
7. Push notifications
This version does not enable push notifications. It does not request notification permission and does not collect a push token.
8. Children's privacy
The app is not directed at children and does not knowingly collect personal data from children. If you believe a child has provided us with personal data, please contact us and we will address it promptly.
9. Retention and deletion
On-device data: removed entirely when you delete the app; individual records can also be swiped away in the app.
Ranking counters: anonymous aggregate numbers that cannot technically be traced to an individual, so per-person deletion is not possible.
10. Changes to this policy
If this policy changes we will update this page and revise the effective date above. Material changes will also be noted in the app's release notes.