AppSwitcher Privacy Policy & Data Deletion Guide

Last updated: May 25, 2026

Welcome to AppSwitcher (hereinafter referred to as "the App"). This App is developed by Aelius Manufacture Group (hereinafter referred to as "we", "us", or "our") to provide a floating window for quickly switching between applications. We value your privacy and want to clearly explain how we collect, use, and protect your data.

1. Information We Collect

1.1 Information You Provide Voluntarily

• Google Sign-In Information: You may choose to sign in with your Google account to sync subscription status. When you sign in, we request your Google account ID and email address. These are processed with SHA-256 to generate an anonymous obfuscated ID (obfuscatedAccountId) stored locally and on our server, used to link your subscription records. We do not store or share your plaintext password or full email address.
• Purchase Credentials: When you subscribe to the App via Google Play, we process the purchase token, order ID, and product ID provided by Google Play to verify subscription validity and expiration. We do not store your credit card or payment card information.
• Obfuscated User ID: To identify your subscription status, we generate a locally stored obfuscated ID (obfuscatedAccountId) using SHA‑256. This ID is associated with your device but cannot be traced back to your personal identity. It is transmitted to our server to link subscription records.

1.2 Automatically Collected Information

• Installed App List: After you grant permission, we read the list of installed applications (including app names and package names) on your device so you can select which apps to include in the switcher. This data is stored only locally and is never uploaded to our server.
• Device Identifier (deviceId): To prevent the same account from being used simultaneously on multiple devices (conflict detection), we generate a unique, obfuscated device identifier on your device and upload it to our server. This identifier is linked to your obfuscated account ID, cannot be reverse-engineered to reveal your actual device information, and is used solely for device conflict checking and ensuring proper service operation.
• Crash Logs and Diagnostics: When the app crashes or encounters an error, we collect device model, OS version, app version, error stack traces, and crash time via Firebase Crashlytics. This information helps us fix issues and improve stability.
• Custom Error Events: Certain critical business errors (e.g., subscription verification failures) are reported to our own server through our ErrorReporter module. This includes error codes, messages, and basic device information (such as Android version) to monitor service health.
• Network Status: Firebase Crashlytics may collect connection type (Wi‑Fi / mobile data) to analyze crash contexts.

1.3 Information Collected by Third‑Party SDKs

• Google Play Billing Library: Used to handle subscription purchases. It collects purchase tokens, order IDs, and subscription status. For details, see Google’s Privacy Policy.
• Firebase Crashlytics: Used for crash reporting. It may collect device identifiers (e.g., Android ID), crash logs, and diagnostic information. See the Firebase Privacy Policy for more.
• Google AdMob: Used to display interstitial ads. AdMob collects Android Advertising ID (AAID), IP address (to infer approximate location), and ad interaction data (impressions, clicks). See Google’s Privacy Policy.
• Firebase Cloud Messaging (FCM): Used for push notifications. It collects FCM registration tokens to send you important service messages (e.g., subscription expiration, account logout).
• OkHttp / Retrofit: Used to communicate with our server for subscription verification and error logging. All connections are encrypted via HTTPS.

1.4 How to Obtain Your Obfuscated ID and Purchase Token

You can view your anonymous obfuscated ID (obfuscatedAccountId) and the subscription purchase token in the app’s “Settings” page. This information can help you quickly identify your data when contacting support.

2. How We Use Your Information

• Provide core functionality: quickly switch between apps based on your selected list.
• Process subscriptions: verify purchases, manage subscription status (including the 7‑day free trial), and prevent fraud.
• Device conflict detection: use deviceId to prevent the same account from being used on multiple devices simultaneously.
• Display ads: for non‑subscribers, we show Google AdMob interstitial ads to support ongoing development. Ad serving may use your approximate location and advertising ID.
• Push notifications: use FCM tokens to send important service alerts (e.g., subscription expiration, forced logout).
• Improve the app: analyze crashes and errors to optimize user experience.
• Customer support: if you contact us by email, we may use the information you provide to assist you.

3. Information Sharing

We share your information only in the following circumstances:

• Google: Necessary information (such as purchase tokens, advertising ID, crash logs, FCM tokens) is shared with Google through Google Play Billing, AdMob, Firebase Crashlytics, and Firebase Cloud Messaging.
• Our own servers: Subscription verification requests, error logs, and deviceId are transmitted to our servers (located in Hong Kong) for the purposes stated above.
• Legal requirements: We may disclose information if required by law or in response to valid requests by public authorities.

We do not sell, rent, or trade your personal information to any third party for marketing purposes.

4. Data Retention

• Locally stored data: Your selected app list and preferences are stored only on your device. You can delete this information by clearing app data or uninstalling the app.
• Server subscription records: Subscription data associated with your obfuscated ID (e.g., purchase tokens, expiry dates, subscription status) is retained while your subscription is active. If you cancel your subscription or request deletion, we will delete or anonymize these records within 30 days. However, transaction records (e.g., order IDs) may need to be retained for 5 years for tax and anti‑fraud purposes, and will no longer be used for any other purpose.
• Device identifier (deviceId): As long as your account is not deleted, the deviceId remains associated with your obfuscated account ID. Once you request deletion via the in-app “Delete Account” function, we will immediately delete all deviceId records associated with your account.
• FCM token retention: As long as you are logged in and have not deleted your account, your FCM token is retained on our server and in Firebase. When you log out, delete your account, or uninstall the app, the token will be cleared or marked invalid.
• Crash logs: Logs collected via Firebase Crashlytics are automatically deleted after 90 days. Error logs on our own servers are also anonymized after 90 days.

5. Your Rights

• Access and Deletion: You can delete your personal data at any time by going to the Settings page in the App and tapping the "Delete Account" button. This will immediately send a deletion request to our server, removing your obfuscated ID, device identifier, and linked subscription records. Please note that certain transaction records (e.g., order IDs) may be retained in anonymized form for legal compliance.
• Manage Permissions: You can manage floating window permission and app list access through your device’s Settings → Apps → AppSwitcher → Permissions.
• Stop Using: You can stop all data collection by uninstalling the app. Local data will be removed, and server data will be handled according to the retention policy above, unless you actively request deletion via the in-app “Delete Account” feature.
• Ad Consent Management: We use Google User Messaging Platform (UMP) to ask for your advertising consent on first launch. You can change your personalized ad consent at any time by tapping the “Privacy Options” button in the Settings page.
• Control Advertising ID: You can reset your advertising ID or enable “Limit Ad Tracking” via your device’s Settings → Google → Ads. Enabling limits will cause AdMob to show only non‑personalized ads (no interest‑based data used).

6. Children’s Privacy

This app is not intended for children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have inadvertently collected such information, we will delete it immediately.

7. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. If we make material changes, we will notify you through an in‑app notice or upon the next release. We encourage you to review this page periodically for the latest information.

How to Delete Your Data (In-App Method)

Under applicable laws (such as GDPR, CCPA), you have the right to request deletion of your personal data stored on our servers. The app provides a simple, built‑in way to do this:

1. Open the App and tap the Settings button (⚙️) on the main screen.
2. In the Settings page, locate the "Delete Account" button.
3. Tap it and confirm the deletion in the dialog that appears.
4. After confirmation, the App will automatically send a deletion request to our server and clear all local data. You will be logged out and must sign in again to use the service.

Please note: account deletion is irreversible. Once deleted, your subscription records, obfuscated ID, device identifier, and associated data will be permanently removed from our servers (except for anonymized transaction records required by law).

📧 Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us at:

• Email: project01hk@gmail.com (for general inquiries only, not for data deletion requests)