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PRIVACY POLICY · October 22, 2026

How Your Card Data Is Handled

This privacy policy applies to the Card Master iPhone app and this website, covering English, Traditional Chinese and Japanese editions.

1. Business Cards and Recognition

Card photos, recognized text, names, companies, phone numbers, email addresses, postal addresses, tags, and notes are stored locally on your device. Card Master utilizes Apple's on-device recognition and never transmits card contents to external AI services, advertising networks, or our own servers. Core recognition, editing, and search operate completely offline without requiring an account.

2. Private Cards and Cryptographic Keys

Card records are encrypted with device keys. Private cards additionally require Face ID, Touch ID, or device passcode authentication. Device-specific keys do not transfer automatically across devices, and removing your passcode may invalidate private keys. The app cannot prevent screenshots, jailbreak exploits, or physical device compromises.

3. Backups and External Copies

You may export an encrypted backup file alongside a 256-bit Recovery Code. Our support team cannot recover lost codes. Exported plaintext VCF or CSV files and synchronized system contacts leave the protection of the app's private vault.

4. Advertising

The free version utilizes Google AdMob (which may serve ads via Liftoff Monetize and Unity Ads). The app asks for permission through the iOS App Tracking Transparency prompt. Personalized ads based on your interests are shown only if you choose Allow (ad services may then use the device advertising identifier); if you choose Ask App Not to Track or have not answered, the app requests only non-personalized ads and disables publisher first-party IDs. You can change this anytime in iPhone Settings › Privacy & Security › Tracking. These providers may process IP addresses, device identifiers, and diagnostic interaction logs. Either way, business card photos, recognized text, contacts and notes are never passed to ad networks. Purchasing the lifetime ad removal permanently ceases ad loading, and the app no longer asks for tracking permission.

5. In-App Purchases

The Apple App Store processes all payments via StoreKit. Card Master does not receive financial or credit card data. The lifetime ad removal is a one-time non-consumable purchase, not a subscription.

6. Device Permissions

Camera access is used for card capture; photo picker reads selected card photos; biometric authentication safeguards private cards; Contacts and Calendar permissions are requested when you choose to access the relevant feature.

7. Data Deletion and Support

You can delete cards within the app at any time. Deleting the app removes local databases. When contacting support, never include client business cards, confidential records, or recovery codes.

8. Contact

Privacy inquiries can be directed to mkjohnny@gmail.com.

Website analytics

This website uses Google Analytics 4 to measure page usage and App Store link clicks. Browser and network information may be sent to Google. Website analytics do not include the app’s business card contents.

Your data, your choice

Available in 1.5: In-app Apple calendar editing, event linking and follow-up planning are free. The existing lifetime upgrade includes Relationship Map and encrypted personal iCloud backup/restore at no additional purchase. Local encrypted backups remain free. iCloud backup is initiated by you, requires an Apple account, iCloud Drive and storage, and is not live sync. Only encrypted files are uploaded; recovery codes are not. Keep your recovery code separately; support cannot recover it. Delete backups in Files > iCloud Drive > 人脈大師 > EncryptedBackups, then remove them from Recently Deleted for permanent removal. Deleting a backup does not delete local cards; deleting the app does not delete cloud backups. Shared attributes in Relationship Map do not establish that people know each other. Optional Apple Intelligence industry suggestions process company and job title on-device and require your confirmation. Full calendar access is requested on demand to retrieve/edit user-linked events; events follow your calendar account sync settings. Reminders is not accessed.

VERSION 1.5

New in 1.5: Japanese, extensions and optional card backs

Use English, Traditional Chinese or Japanese, with a country/region hint for each card. Keep departments and name readings. Add phone extensions and dialing delays: one comma pauses for 2 seconds, two for 4 seconds, with pauses preserved in Contacts and vCard. Capturing the back is entirely optional: save the front alone or add the back later. Recognize second-language text and product details on-device, then review and confirm products/services for search. The lifetime Relationship Map can show shared confirmed products; shared attributes do not mean two people know each other.

Requires iOS 17 or later. Apple Vision OCR does not require Apple Intelligence. Optional industry suggestions require a supported iOS 26+ device, supported language and an available Apple Intelligence on-device model. Manual organization remains available. No external or cloud AI is used. Ads, purchases and user-initiated encrypted personal iCloud backups require a connection.