Privacy Policy

1. Introduction

Wallet of USDT ("we," "us," or "our") operates the Wallet of USDT mobile application and web application (collectively, the "Service"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.

By using Wallet of USDT, you agree to the collection and use of information in accordance with this policy. If you do not agree, please do not use the Service.

2. Information We Do NOT Collect

As a non-custodial wallet, we want to be clear about what we do not collect or have access to:

• Private Keys: Your private keys are generated and stored exclusively on your device in the Secure Element. We never have access to them.
• Recovery Phrases: Your 12-word BIP39 mnemonic is generated locally on your device. We never see, store, or transmit it.
• Wallet Balances: We do not track or store your USDT balances. Balance queries are made directly to blockchain nodes.
• Transaction History: We do not maintain records of your transactions. Transaction data is retrieved directly from the blockchain.
• Passwords or PINs: Authentication is handled through device-level Passkey (WebAuthn). We do not process passwords.

3. Information We Collect

We collect minimal information necessary to provide the Service:

3.1 Username Registration (Optional)

If you choose to register a username, we store:

• Your chosen username (e.g., @alice)
• Your associated wallet address (public address only)
• Registration timestamp

This data is stored on our servers to enable the username resolution service.

3.2 Push Notification Tokens (Optional)

If you enable push notifications, we store:

• Firebase Cloud Messaging (FCM) device token
• Your wallet address (to route notifications)

3.3 Device Information

We may collect basic device information for app functionality and crash reporting:

• Device type and operating system version
• App version
• Crash logs and error reports (anonymized)

3.4 Analytics (Anonymized)

We may collect anonymized usage analytics to improve the Service, such as:

• App feature usage frequency (without identifying data)
• Preferred language selection
• General geographic region (country-level, not precise location)

4. How We Use Your Information

We use the limited information we collect for:

• Resolving usernames to wallet addresses when sending USDT
• Delivering push notifications for incoming transfers
• Improving app performance and fixing bugs
• Providing customer support when requested
• Ensuring service reliability and uptime

5. Third-Party Services

Our Service integrates with the following third-party services:

5.1 ZeroDev

Used for Account Abstraction (ERC-4337) and Paymaster services. ZeroDev processes UserOperations for gasless transactions. ZeroDev Privacy Policy

5.2 Onramper

Used for fiat-to-crypto purchases. When you use the Buy feature, you interact directly with Onramper's platform. We do not process or store payment information. Onramper Privacy Policy

5.3 Across Protocol

Used for cross-chain bridge transactions. Bridge operations are processed through Across Protocol's smart contracts.

5.4 Firebase (Google)

Used for push notifications (FCM) and crash reporting (Crashlytics). Firebase Privacy Information

5.5 Google Drive

Used for optional encrypted cloud backup. Backup data is encrypted with AES-256-GCM before upload. Google cannot read the contents. Google Privacy Policy

5.6 Blockchain Networks

Transactions are broadcast to public blockchain networks (Base, Ethereum, Polygon, Arbitrum, BNB Chain, TRON). All blockchain transactions are public and immutable by nature.

6. Data Storage and Security

We implement industry-standard security measures:

• All server communications use TLS 1.3 encryption
• Username and notification data is stored in encrypted databases
• Server infrastructure is hosted on secure cloud platforms with regular security audits
• Access to server data is restricted to essential personnel only

7. Cloud Backup

The optional Cloud Backup feature works as follows:

• Backup is initiated only by you (user-triggered)
• Your wallet data is encrypted locally on your device using AES-256-GCM encryption before being uploaded
• The encryption key is derived from your Passkey — only you possess the decryption capability
• The encrypted backup is stored in your personal Google Drive account
• We cannot access, read, or decrypt your backup under any circumstances

8. Push Notifications

If you enable push notifications:

• We use Firebase Cloud Messaging (FCM) to deliver notifications
• We monitor blockchain events associated with your public wallet address to detect incoming transfers
• You can disable notifications at any time through the app settings or your device settings
• Disabling notifications will delete your FCM token from our servers

9. Cookies and Tracking

Our mobile application does not use cookies. Our website (walletofusdt.com) may use:

• Essential cookies: For language preferences and basic functionality
• Analytics cookies: Anonymized usage data to improve the website

For more details, see our Cookie Policy.

10. Your Rights

Depending on your jurisdiction, you may have the following rights:

For All Users

• Access: Request a copy of the data we hold about you
• Deletion: Request deletion of your username and notification tokens
• Opt-out: Disable push notifications and analytics at any time
• Portability: Export your wallet data (recovery phrase) at any time through the app

For EU/EEA Users (GDPR)

• Right to rectification of inaccurate data
• Right to restrict processing
• Right to object to processing
• Right to lodge a complaint with a supervisory authority

For California Users (CCPA)

• Right to know what personal information is collected
• Right to delete personal information
• Right to opt-out of the sale of personal information (we do not sell personal information)
• Right to non-discrimination for exercising privacy rights

11. Children's Privacy

Wallet of USDT is not intended for use by individuals under the age of 18. We do not knowingly collect information from children. If we discover that a child has provided us with personal information, we will delete it immediately.

12. International Data Transfers

Our servers may be located in different jurisdictions. By using the Service, you consent to the transfer of your information to jurisdictions that may have different data protection laws than your country of residence. We ensure appropriate safeguards are in place for such transfers.

13. Data Retention

• Username data: Retained as long as the username is active. You can delete your username through the app.
• Notification tokens: Retained as long as notifications are enabled. Deleted when you disable notifications or uninstall the app.
• Analytics data: Anonymized analytics are retained for up to 24 months.
• Crash reports: Retained for up to 90 days.

14. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by:

• Posting the updated policy on this page with a new "Last updated" date
• Sending an in-app notification for material changes

Your continued use of the Service after changes constitutes acceptance of the updated policy.

15. Contact Us

If you have questions about this Privacy Policy or wish to exercise your data rights, contact us at:

• Email: [email protected]
• Website: walletofusdt.com/support