It blocks unwanted calls, SMS messages, and app notifications without replacing your default call/SMS app. Notification Screening applies your blocking rules to RCS, Signal, WhatsApp, email, and any other messaging app that posts a notification, not just your default SMS app, so spam gets filtered no matter which app it arrives through. Alerts give you a lightweight sound/vibration/flashlight/screen-wake chime for allowed screened notifications, instead of a duplicate full notification. Filters: 1. Number Rules & Text Rules 2. Contact 3. STIR attestation 4. Repeated call 5. Dialed number 6. Recently used apps 7. Time schedule 8. Notification Screening Details: https://github.com/KerballOne/SpamBlocker-Extended