Privacy Policy隐私政策

Last updated: September 10, 2026

OffMemory ("we", "the App") is built on a single principle: your notes are none of our business. This Privacy Policy explains, in plain language, exactly what the App does and does not do with your information.

1. The Short Version

• The App has no network capability at all. It does not request, hold or use any networking permission.
• We never collect, transmit, store, share or sell any of your personal data, notes, images, passwords or device identifiers.
• We have no account system, no email, no phone number, no registration, no analytics, no crash reporting and no advertising SDK.
• Everything you write is encrypted with AES-256 and stored only on your own device.
• The only exception to "no network" is Apple's in-app purchase channel, which is required to process the one-time unlock. Apple handles that transaction entirely; we receive no personal data from it.

2. Information We Collect

None. The App does not collect any information whatsoever — not personal information, not usage data, not device data, not diagnostics. Because the App has no networking capability, even if we wanted to collect such data, the App is technically unable to send it anywhere.

3. How Your Data Is Stored

• Location: All notes, folders, tags and images are stored in a local database inside the App's private sandbox on your device.
• Encryption: Note titles, note bodies and images are encrypted using the AES-256-CBC algorithm before they are written to disk. Your master encryption key is derived from your password using PBKDF2-HMAC-SHA256 and is stored in the system Keychain.
• Backups: We do not back up your data. If you use the App's export feature, the encrypted backup file you create is stored wherever you choose (Files app, iCloud Drive, etc.) and remains fully encrypted with your password. We have no access to it and cannot open it.
• Automatic device backups: Any backup made by your operating system (for example, an iTunes or iCloud device backup) is created and controlled entirely by Apple. Please note that such a backup may contain the App's encrypted database files. Those files remain encrypted, and your password is never included.

4. Passwords and Recovery — Please Read Carefully

Your password is never transmitted, never stored on any server, and cannot be recovered by us. We do not operate any server that could hold it. This is a deliberate design decision, and it is the reason true privacy is possible.

• If you forget your password, we cannot reset it for you, and we cannot recover your notes.
• The App offers security questions as a recovery mechanism. If you configure them, an additional encrypted copy of your master key is created locally. Answering your security questions correctly lets you set a new password while keeping your data.
• If you forget both your password and your security answers, the only remaining option is to erase all local data and start over. This erasure is permanent and irreversible.

5. Biometric Unlock (Face ID / Touch ID)

If you enable biometric unlock, the App asks iOS to store a credential in the device Keychain that can be released after a successful Face ID or Touch ID match. Biometric authentication is performed entirely on your device by the operating system. We never receive your face or fingerprint data, and no biometric information ever leaves your device.

6. Photos and Files

The App requests access to your photo library only in two situations, and only after you explicitly grant permission:

• Inserting an image: the selected image is encrypted and copied into the App's private storage.
• Exporting a backup: the encrypted backup file is written to the location you choose.

You may deny or revoke these permissions at any time in iOS Settings. Denying them does not affect any other feature.

7. Purchases

OffMemory offers a single one-time purchase that permanently unlocks unlimited notes. There is no subscription, no auto-renewal, no trial period and no advertising. All payment processing is handled by Apple through the App Store. We do not receive your name, email address, payment card number or any other personal information from Apple in connection with your purchase.

8. Third-Party Services and SDKs

The App contains no third-party analytics, advertising, crash-reporting, social or attribution SDKs. The only third-party component with any network capability at all is Apple's StoreKit framework, which exists solely to process the one-time purchase described above.

9. Children's Privacy

The App is not directed to children under the age of 13 and does not knowingly collect any information from anyone. Because the App collects no data at all, no information from any user — including children — is ever obtained, stored or shared.

10. Data Retention and Deletion

Because we hold no data, there is nothing for us to retain or delete. You are in complete control of your local data at all times:

• Deleting a note moves it to the in-app Trash, where it is permanently deleted automatically after the retention period stated in the App.
• Using "Erase All Data" in Settings permanently destroys all local notes, folders, tags, images and encryption keys.
• Uninstalling the App removes all of its local data from your device.

These actions are irreversible.

11. Security

We protect your data with the following measures, all of which run locally on your device: AES-256-CBC encryption of note content and images; PBKDF2-HMAC-SHA256 key derivation; storage of keys in the iOS Keychain; mandatory password unlock with brute-force protection (progressive lockout after repeated failures); optional Face ID / Touch ID; automatic re-lock when the App enters the background; and an optional screenshot-blocking mode on note detail pages. No method of electronic storage is perfectly secure, and we cannot guarantee absolute security — but because your data never leaves your device, remote compromise of it is not possible.

12. Changes to This Policy

If we update this Privacy Policy, the revised version will be included in the next release of the App, and the "Last updated" date above will change. Continued use of the App after an update constitutes acceptance of the revised policy.

13. Contact

If you have questions about this Privacy Policy, please reach us through the support information listed on this App's App Store page.

Remember: your password and your security answers exist only in your own memory. Guard them carefully. Losing them means losing your data permanently — there is no exception.