Privacy Policy

Introduction

The App and its official website interface-tech.com.cn are operated by Shanghai Interface Future Network Technology Co., Ltd. ("Interface Future", "we", "us"). This Privacy Policy explains how Wert (referred to as "the App") and its website handle your information. Please read this policy before using the service to understand how we process your personal information.

Core Principle: Local-First

Your financial data is stored on your device and is never uploaded to our servers. This includes: your asset accounts, liabilities, snapshots, net worth, holdings quantities and amounts. This data is stored locally on your device (iOS SwiftData) and our servers cannot access it.

We do not collect sensitive personal information such as your financial details (asset amounts, holding quantities, net worth) to our servers — this data always remains solely on your device.

What Information We Process

Information you provide directly:

Sign in with Apple credentials: a stable user identifier, email address (may be Apple's private relay address), and display name provided by Apple. Used to create your account and identify your subscription and quota.

Feedback: the email address and feedback content you send by email via the website feedback entry.

Information generated automatically when you use the App:

Market data queries: when you view prices, the App sends the queried asset symbols (e.g. 600519.CN, AAPL.US) to our servers to retrieve quotes; the server caches these symbols. This reflects which symbols you queried, but does not include your holding quantities or amounts (those remain on your device only).

Exchange rate queries: the currency pairs you request for conversion.

Subscription credentials: when you subscribe to Pro via Apple In-App Purchase, Apple's transaction identifiers are used to verify subscription status.

The mainland China edition does not integrate third-party usage analytics or crash reporting SDKs, and does not transfer your usage data to overseas analytics services.

How We Use This Information

To provide and maintain App features (quotes, exchange rates, search, subscriptions)

To verify and manage your Pro subscription and usage quota

To respond to your feedback

To troubleshoot issues and ensure security

We do not sell your personal information. There are no ads in the App.

Third Parties and Data Processors

To provide the service, we share necessary data with the following processors:

Apple — Sign in with Apple, In-App Purchase subscriptions, iCloud sync (iCloud services in mainland China are operated by GCBD, with data stored within mainland China)

Alibaba Cloud — server and database hosting (within mainland China)

Market Data Sources (Do Not Receive Your Personal Data)

To provide quotes, exchange rates, and symbol search, our servers query several third-party market data providers. These queries are server-to-server only, contain only asset symbols or currency pairs, and do not include any information that identifies you. Therefore, no personal data is shared externally through these queries.

Data Storage Location and Retention

Our servers and database are located within mainland China (Alibaba Cloud).

Price and exchange rate caches are retained as needed; account and subscription information is retained for the duration of your account.

After you delete your account, we will delete the server-side information associated with your account (except where retention is required by law).

Data Security

We use reasonable measures such as HTTPS transport encryption and access authentication to protect information. However, no system can guarantee absolute security.

Your Rights

To the extent applicable law allows, you have the rights to access, obtain a copy of, correct, delete, withdraw consent for, and request an explanation of the processing rules concerning your personal information. As your financial data is stored only locally, the personal information held on the server side is very limited.

Access and correction: you can view and manage your settings within the App.

Account deletion: you can delete your account within the App (Settings → Account → Delete Account, then confirm). After deletion, the login credentials, Pro subscription records, and quota associated with your account will be permanently erased from our servers (except where retention is required by law). Financial data stored locally on your device is removed when you uninstall the App or clear it manually within the App.

You may also contact us at dev@wert.app to exercise these rights.

Children's Privacy

The App is not directed at children under 13, and we do not knowingly collect their personal information. If you are a parent or guardian and believe a child has provided us with information, please contact us at dev@wert.app to have it deleted.

International Data Transfers

For users in mainland China, our servers and database are hosted within mainland China (Alibaba Cloud); we do not transfer your account, subscription, or query data outside mainland China.

Sign-in, In-App Purchase, and iCloud services provided by Apple are processed by Apple under its own privacy policy; iCloud services in mainland China are operated by GCBD, with data stored within mainland China.

Legal Bases and Regional Rights (Where Applicable)

Where the EU General Data Protection Regulation (GDPR) applies, our legal bases for processing your personal information include: performance of a contract to provide the service to you, our legitimate interests in improving the product, and, where applicable, your consent. You have the rights of access, rectification, erasure, restriction of processing, data portability, and to object to processing.

Where the California Consumer Privacy Act (CCPA/CPRA) applies, we do not "sell" or "share" your personal information for monetary or other valuable consideration.

You may exercise these rights by contacting us at dev@wert.app.

Policy Updates

We may update this policy. Significant changes will be notified on this page or within the App. This policy is effective as of the update date shown above.

Contact Us

For any privacy-related questions, please contact: dev@wert.app

If you believe our handling of your personal information has infringed your rights, you may file a complaint with us at dev@wert.app; you also have the right to lodge a complaint with the competent data protection authority.