Privacy Policy: Hachimi.ai (哈基米道长)
Last updated: 2026-10-03
Hachimi.ai (哈基米道长, “the App”) is a charting and question-reading tool for iOS and Android, run by Yuenchuk Investment Limited (元竹投資有限公司) in Hong Kong. This policy explains where the App keeps your cases and reading history, which features go online, and how to manage and delete them.
1. Where your cases and history are kept
Cases, reading history and the notes Hachimi keeps from past questions stay on your device. On iOS they sync to your iCloud; on Android they are saved to your Google Account with your system backup. There is no account to sign up for.
2. Features that go online
- Online readings: your question, the hexagram, and any chart owner's Ba Zi or past notes you choose to include go through our server to a third-party AI service, which writes Hachimi's reading. The App asks for your permission before the first one. We keep questions and readings on our server for a while to improve readings, then delete them.
- Chart Patterns, zizhan and the Four Pillars lookup: the birth details or numbers they need go to our server, are calculated, and come straight back. We don't keep them.
- Usage statistics: the App sends anonymous usage counts, and the iOS version also sends crash diagnostics, so we can improve it. Statistics carry a random identifier, which you can reset under Me > Privacy and data.
- Feedback and reports: notes you send from Write to Hachimi, the comment you add to a report and the reading you report, together with the app version, system version and interface language, are stored on our server to improve the product and handle reports. They carry no anonymous identifier. Notes are kept for 180 days and reports for 30 days, then deleted.
- Membership: Apple or Google handles payment, and the App checks membership status with the store.
3. Permissions
The microphone turns what you say into text, and recognition happens on your device. Location is used only in zizhan, to read an approximate longitude once. On iOS, saving a share image writes it to your photo library.
4. Managing and deleting your data
- Under Me > Privacy and data, you can delete all reading data and reset the anonymous identifier. To turn off online readings, open Privacy Policy on that page and use the button at the bottom.
- Delete cases one by one in your case library.
- You manage copies in iCloud and in system backups in your phone's settings.
- Depending on where you live, you can ask to access, correct or delete your data, or withdraw consent. Just email us.
5. Age
The App is for users aged 13 and over.
6. Changes and contact
When this policy changes, the "Last updated" date changes with it.
Yuenchuk Investment Limited (元竹投資有限公司), Hong Kong
Email: voice@hachimi.ai