Privacy Policy for Call Quarantine

Effective date: March 17, 2026

Call Quarantine is an Android call-screening app. This Privacy Policy explains what data the app accesses, how the app uses it, what stays on your device, and what third-party services are involved.

Who we are

Publisher: 499apps
Privacy center: https://privacy.499apps.com/
Repository: https://github.com/499apps/privacy-policy

What data the app accesses

• Incoming phone numbers provided by Android call-screening APIs when calls arrive.
• Contact lookups, if you grant READ_CONTACTS, to determine whether a caller is in your contacts.
• Recent call history timestamps, if you grant READ_CALL_LOG, to determine whether a caller is in your recent calls.
• Phone numbers used for the app's allowlist, blocked/quarantined caller history, and call decision events.
• Custom quarantine SMS text you choose to save in the app.
• Premium purchase state from Google Play Billing for the premium_unlock product.

Permissions the app requests

• READ_CONTACTS: used to allow calls from people already in your contacts.
• READ_CALL_LOG: used to allow calls from numbers that appear in your recent call history.
• SEND_SMS: used to send a quarantine notice SMS to a caller when the app quarantines a call.

How the app uses your data

• To decide whether an incoming call should be allowed, quarantined, temporarily allowed, or blocked.
• To keep an on-device history of screened callers and call actions.
• To store your local settings, such as bypass rules, allowlist entries, premium status, and custom app message text.
• To send an SMS notice from your device to a quarantined caller when that feature is used.
• To restore and verify your premium entitlement through Google Play Billing.

What stays on your device

Call Quarantine is designed to work locally on your device. The app stores its own data in local Android storage, including:

• app settings and allowlist values in SharedPreferences
• caller profiles and quarantine events in a local Room database

Based on the current app implementation, the app does not use a developer-operated backend service to upload your contacts, call log, call history, caller profiles, or saved messages.

Third-party services

• Google Play Billing is used to query product details, start purchases, restore purchases, and acknowledge completed purchases.
• Your mobile carrier and device SMS service are used when the app sends a quarantine SMS notice.

The app does not include Firebase Analytics, Crashlytics, Sentry, Datadog, ad SDKs, or a custom analytics backend in the current codebase.

Does data leave the device?

• Call screening logic, contact checks, recent-call checks, allowlist checks, and local history storage happen on-device.
• Purchase-related information is handled through Google Play Billing and Google Play services.
• If you use the quarantine SMS feature, the SMS content and destination number leave your device through your device's SMS stack and carrier network.

Data retention and deletion

App settings, allowlist entries, caller history, and quarantine events remain on your device until you remove them in the app, clear app storage, or uninstall the app. Depending on your Android backup settings, some local app data may also be included in device backups managed by Android.

Children

Call Quarantine is not directed to children.

Changes to this policy

We may update this Privacy Policy as the app changes. The latest version will be published at this URL.

Contact

For privacy questions about Call Quarantine, use the developer contact information provided in the app's Google Play listing.