RegexPhone

For every incoming call, RegexPhone matches the caller's phone number against your rules and either lets it ring, rejects it, or silences the ringtone. Each rule is a regular expression with an action (BLOCK, SILENCE, or ALLOW) and, for block rules, control over whether the missed-call notification should appear.

Highlights

- Three actions per rule. BLOCK rejects the call; SILENCE mutes the ringtone but lets the call still hit the call log and notification shade; ALLOW whitelists.
- Per-block flag. Skip the missed-call notification, per rule. Android itself always records blocked calls in the call log; only carrier and system screeners may suppress that, so RegexPhone does not pretend to offer it.
- Predictable precedence. Allow beats block beats silence; otherwise the call is allowed. The verdict does not depend on rule order; only the notification flag comes from the first matching block rule.
- Live tester. The edit screen previews, as you type, the decision the service would take for a sample number across all enabled rules, naming the rule that decides.
- Import / Export. Save the full rule set to a JSON file via Storage Access Framework, restore it on another device, or merge two sets together. No permissions needed.
- Simple storage. Rules are JSON in SharedPreferences, kept in device-protected storage so screening already works between a reboot and the first unlock. Device-protected storage is encrypted with a device key rather than the lock-screen credential.
- No background services, no contacts permission, no network access.