Terms of Service

DAYUMEMO is a private note application operated by an individual developer and supported in part by advertising. It provides encrypted notes, attachment management, and multi-device synchronization. By creating an account or using the service, you agree to these terms. Mandatory consumer rights under the law of your country or region remain unaffected.

1. Service

The app provides Markdown editing, encrypted local storage, attachments, import and export, account migration, version history and cross-device synchronization. Features may differ by platform and release.

2. Account and recovery

You are responsible for keeping your password, verification codes, devices and account migration QR code secure. Encryption keys are not uploaded in plaintext. Before uninstalling, clearing app data, replacing or resetting a device, save a usable migration QR code and verify recovery on the new device. Data that becomes inaccessible because the only recovery material was lost may not be recoverable.

3. Your content

You retain your rights in notes and files you create or upload. You grant only the limited permission necessary to encrypt, store, transmit, synchronize, preview and return that content. You are responsible for the legality of your content and for maintaining independent backups of important material.

4. Acceptable use

Do not use the service to violate law or third-party rights, distribute malware, attack systems, bypass security restrictions or consume resources through abusive automation.

5. Free service and advertising

A non-empty note list may contain no more than one clearly labelled, non-personalized sponsored card. Sponsored content is separated from notes and does not use note text, attachment contents, passwords, encryption keys or migration QR codes for selection. Closing or ignoring an ad does not affect core note features.

Sponsored links can open third-party services. Transactions with an advertiser are between you and that advertiser. DAYUMEMO will comply with applicable advertising and platform duties, but does not endorse or warrant third-party products.

6. Availability and changes

Network, device, platform, maintenance and force-majeure events can interrupt service. Export important notes regularly. Material changes to advertising or personal-data processing will be notified before they take effect, and renewed consent will be requested where required.

7. Ending use

Signing out does not delete an account. You may stop using the app, export or delete notes, or request account deletion. We may restrict abusive or unlawful use. Retained data is handled under the Privacy Policy and applicable law.

8. Responsibility

The service is provided on an “as available” basis. To the extent permitted by law, the developer is not responsible for losses caused by user error, loss of recovery material, compromised or modified devices, malware, third-party software, network failures or events outside reasonable control.

Nothing in these terms excludes liability that cannot legally be excluded, including liability arising from fraud, wilful misconduct, gross negligence, personal injury, or mandatory consumer and privacy protections where applicable.

9. Law and disputes

These terms are governed by the laws applicable to the operator, without removing mandatory protections granted by the law of your habitual residence. Please contact us first so a dispute can be addressed informally.

10. Contact

Email yushenrui@gmail.com. Do not send passwords, verification codes, migration QR codes or private note content.