The ZiZBJJ app
ZiZBJJ (the “App”) is developed and operated by ZiZai (Beijing) Tech Co., Ltd (“we”). It is built local-first and puts your privacy first. This policy explains how the App handles your information. Using the App means you have read and understood it.
1. Our principle
The cards, notes, connections and training media you create are processed and stored on your device by default. Copies you choose to export, provide to external tools or send to support are handled as described in the relevant sections below.
2. What we collect
2.1 Content you create: This includes card text, notes, mastery progress, connection layouts, and images and short videos you import. This content is processed and stored on your device by default. User-initiated exports and disclosures to external tools or support are described below.
2.2 Purchase-related information: The App does not require a ZiZBJJ service account. Apple handles App Store authentication and purchases. On your device, the App uses StoreKit to process transaction and product identifiers, original purchase dates, and verification and revocation status to determine access. Apple account authentication is separate from a local collection or backup passphrase.
2.3 Diagnostics and Apple reports: The App’s purchase diagnostics record limited status information and error codes locally on the device. After launch, only the person responsible for this App will view necessary crash, usage analytics, sales or purchase reports in Apple’s dashboard as needed, to understand faults, app usage, sales and purchases. We will view these reports online only, without downloading or keeping copies, submitting them to external tools for processing, or forwarding them to third parties. Apple’s retention of reports is governed by its rules.
3. How information is stored
Collections are stored locally by default. iPhone and iPad use the App’s private storage; on Mac, you can use a collection folder you choose. You can export active cards, decks and their referenced media, or create an encrypted backup of this active content protected by a separate passphrase, and save it to a location you choose. Exports and backups do not include Trash, proposal review records or device preferences. A regular ZIP export is readable and is different from an encrypted backup.
This version does not provide automatic collection sync across devices. You can transfer an encrypted backup yourself and restore it as a separate collection on the destination device. Third-party cloud storage, file destinations and copies already shared are managed by you and the respective service providers.
For everyday access to a collection, the App may save an unlock credential in the device’s secure system storage. The App does not sync these credentials to other devices. Restoring an encrypted backup on another device still requires that backup’s passphrase.
4. What we don’t do
- We do not sell, rent or trade any of your personal information;
- We embed no third-party ad SDKs and do no ad tracking based on personal data;
- We do not silently upload your notes or media in the background;
- We do not request system permissions unrelated to features.
5. Third-party links & services
You may add links to teaching videos on platforms such as Bilibili or YouTube; tapping them opens that platform, whose data handling follows its own privacy policy. Purchases in this Apple version use the App Store. Apple’s handling of data related to its store services is governed by its privacy policy.
You can choose to provide export files or proposal request files to external tools. A proposal request file contains the source information you enter, the text of cards you explicitly select, and necessary identifiers.
When you enable a local Agent connection on Mac, the connected host can read content from the open collection within that connection’s permissions. Returned proposals must still be reviewed and confirmed in ZiZBJJ before they modify the content of saved cards or decks. The recipient’s rules apply to its handling of copies it already holds. Closing the connection does not delete those copies.
6. Data security
Because note data is stored locally, its security depends mainly on your own device security (lock screen, system encryption); please lock your device and keep your system updated. In-app encrypted backups are protected by a separate passphrase you set. Keep the backup passphrase securely and separately. Networked purchase verification uses transport encryption (HTTPS).
7. Minors
BJJ is a full-contact sport; train under a qualified instructor and proper supervision. If you are a minor, use the App with the knowledge and consent of a guardian. We do not knowingly collect minors’ personal information.
8. Your rights
You can view, export and back up active content in an open collection. Whether you can edit or delete content depends on your current write access. Moving content to Trash and permanently deleting it are different actions. Uninstalling the App does not replace clearing collections, exports or backups you saved elsewhere, or copies held by third parties. Back up important content before uninstalling. For purchase-related information, you may exercise access and deletion rights through the relevant app store or by contacting us.
9. Support email and access locations
Only customer-support staff and technical personnel who need access to address your request may read support emails. These personnel may access emails from mainland China and the United States. We do not forward support correspondence to other mailboxes or submit it to external AI tools. Where disclosure is required by law or a lawful request from a competent authority, we may provide the relevant correspondence to that authority in accordance with the law. We normally retain support emails for 12 months. You can request earlier deletion by emailing cs@zizai.tech.
10. Changes to this policy
We may update this policy as features evolve, publishing material changes in the App or on the website with an updated date and flagging them in-app where needed. Continued use constitutes acceptance.
11. Contact
For any questions, contact us at cs@zizai.tech.
This website and emails
Website visits
These pages do not ask you to create an account. We do not place advertising or analytics scripts or cookies on this site. Our web host may record ordinary server access information, such as the requested page, time, IP address, and browser details, to operate and protect the site. We do not use those logs to build a training profile.
Emails you choose to send
If you email us about your training notes, support, or a privacy request, we receive the address and information you choose to include. Research replies go to lg@zizai.tech; customer support and privacy requests go to cs@zizai.tech. Our business email provider handles the messages. Please do not send passwords, payment card details, or private notes you do not want us to read.
We use research answers to understand how people remember and revisit BJJ training. AI assistance may help translate and organize those answers. We do not publish your identity or quote you publicly without asking. You can skip questions, reply “stop” to end research follow-up, or ask us to delete your research emails. Launch updates are a separate choice; leaving that choice blank means no updates.
We use support emails to answer your request and investigate the issue you describe. Only customer-support staff and technical personnel who need access to address your request may read these emails. These personnel may access emails from mainland China and the United States. We do not forward support correspondence to other mailboxes or submit it to external AI tools.
We normally retain support emails for 12 months. You can request earlier deletion by emailing cs@zizai.tech. Where disclosure is required by law or a lawful request from a competent authority, we may provide the relevant correspondence to that authority in accordance with the law.
Where information may be handled
ZiZai (Beijing) Tech Co., Ltd is based in Beijing, China. If you email us from the United States, your message may be processed by our email provider and accessed by our team outside the United States. Your email provider also processes the message under its own terms and privacy policy.
Contact and changes
For a privacy question or request, email cs@zizai.tech with “Privacy request” in the subject. We will update the date above when this policy changes.