Stock Average Calculator Privacy Policy

Updated: November 8, 2026
Effective: November 6, 2026

This policy applies to the Stock Average Calculator app for iOS and iPadOS (the “App”). It explains how the App handles information and how you can manage or delete it. It does not apply to an independent web version or other websites.

Developer: 郭威 (Guo Wei)
Privacy contact: gg37888@163.com

1. How we handle information

The App calculates average stock cost, required funds and target costs locally. No account or sign-in is required. Prices, holdings, purchase quantities, fees and target costs you enter are processed on your device. The App does not upload these calculation inputs to us, connect to brokerage accounts or read your actual securities holdings.

The current version has no advertising, third-party analytics or cross-app tracking components. It does not use advertising identifiers for tracking, provide information to data brokers, or sell or rent your personal information.

2. Information processed and stored on your device

Across all supported markets (China mainland, Hong Kong, the United States and South Korea), your original cost, proposed purchase price, share quantities, fee settings and target cost are stored in the App’s local data to perform calculations and restore drafts, until overwritten, reset or deleted with the App’s data. Your selected market, board and calculation mode are stored locally to apply the relevant rules and restore the session. Your language preference is stored locally; when following the system, the App reads the system language on the device.

For the Hong Kong market, the separately entered board lot size is used only during the current session and is not saved as a restorable draft. China mainland, US and South Korean markets use the App’s built-in quantity rules and do not require this extra field. Results are generated on the device and are not automatically sent to us. We do not operate cloud draft storage or cross-device synchronization for the App.

3. Device permissions

The current version does not request access to contacts, photos, camera, microphone or precise location. It does not require your name, phone number, identity documents, bank card number or brokerage credentials. Do not enter passwords, verification codes, bank card numbers or other unrelated sensitive information in calculation fields or support messages.

4. On-device information and Apple services

Trading-rule summaries, the privacy policy and help are included in the App and can be read offline. Launching the App and performing calculations do not load web pages or automatically connect to developer-operated servers.

Depending on your device and Apple account settings, App data may be included in system backups or device migration. These are managed by you and Apple, and we cannot access or manage those backups. Restoring a backup may restore App data. Apple may process App Store downloads, system diagnostics or crash information according to your system settings and may provide developers with permitted reports or aggregated information. Apple’s policies and your system choices apply. The App does not separately integrate third-party diagnostic upload or analytics components.

5. Managing and deleting information

Edit inputs to update a local draft. Reset clears the current calculation, returns fees and purchase quantity to initial values and restores the default market; your language preference is retained. To remove local drafts and language settings, choose “Delete App” on your device. “Offload App” may retain documents and data. Manage copies in system backups separately.

There is no user account or cloud calculation archive held by us. We cannot remotely view, export, change or delete calculations on your device; use the App and device settings to manage them. You do not need to consent to ad tracking or provide information unrelated to calculation to use the calculation feature.

6. Information you send to the developer

If you email us, we receive your email address, message and attachments and use them only to answer your question, handle your privacy request or investigate the problem you reported. Your email provider also processes the message under its own policy. Screenshots and other materials are optional; remove unnecessary holdings, account and identity information before sending.

We retain correspondence only while handling the request and necessary follow-up, then delete information no longer needed unless retention is required by law. You may contact the same email address to request access, correction or deletion of your correspondence.

7. Sharing and security

The current App does not actively upload drafts to us or third parties, and the calculation feature does not store data on a developer server or transfer it across borders. We do not use support messages for advertising or sell them. If handling a request requires additional disclosure to a service provider, we will explain the purpose and scope, obtain consent where legally required, and require appropriate protection, except where disclosure is legally required.

Local drafts are protected by device and operating system access controls. Protect your device and use a suitable screen lock. No storage or communication method can guarantee absolute security.

8. Minors

The App does not ask for age or actively collect minors’ identity, contact or account details. If you believe a minor has provided personal information in a support email that needs attention, contact us. After verification we will take appropriate measures, including deleting information no longer needed.

9. Changes to this policy

If App features or information handling change, we will update this policy and its date. For significant changes such as new collection or sharing, we will notify you appropriately, such as through the App, and obtain consent where required by law. New processing will be consistent with the notice and choices provided at that time.

10. Contact us

For questions about this policy, information handling, or a request concerning information you sent us, contact gg37888@163.com. Provide only the minimum information needed to identify the issue. After verifying your request, we will respond promptly in accordance with applicable requirements.