How Callro Blocks Spam and Scam Calls
Quick Answer
Callro blocks spam and scam calls using an on-device evaluation engine integrated with Android's ROLE_CALL_SCREENING API. The screening decision is made locally on your device, before the phone rings. Callro stops flagged calls from ringing your phone.
How does Callro filter unknown numbers?
Callro is a privacy-first application powered by the Gauntlet Engine that operates on-device to block unsolicited calls via on-device call screening. Explore the full suite of Callro features to learn more.
The filter methodology operates in three distinct phases:
- Scan: Every incoming call passes through on-device verification.
- Filter: Callro stops flagged calls from ringing your phone.
- Protect: Callro blocks or silences the call, so your phone does not ring, stopping neighbor spoofing attacks immediately.
What is the privacy policy of the Callro application?
Callro operates on-device: your Limited operational data flows are described in our Privacy Policy.
How does Callro handle STIR/SHAKEN caller verification?
Callro reads the carrier's STIR/SHAKEN verification status (Passed, Failed, or Unverified) as reported by Android for each incoming call to assess caller legitimacy:
- Passed: The carrier confirmed the number. The call is evaluated against local threat databases.
- Unverified or Failed: Additional on-device screening layers are applied before your phone rings.
Why does Callro charge $9.99 per month?
Callro charges a subscription rather than offering a free tier to eliminate the need for in-app advertising or data monetization. One job: the phone stays quiet.
Who operates the Callro application?
Callro is operated by Vindication Inc., a software development company based in St. Petersburg, Florida, focused on mobile security and privacy-first application design.
Frequently Asked Questions
How does Callro filter unknown numbers?
Callro is a privacy-first application that operates on-device to block unsolicited calls. The filter methodology operates in three distinct phases: Scan: Every incoming call passes through on-device verification. Filter: Flagged numbers are silenced. Protect: Callro blocks or silences the call, so your phone does not ring.
What is the privacy policy of the Callro application?
Callro operates on-device: your Limited operational data flows — such as screening records — are described in our Privacy Policy.
How does Callro handle STIR/SHAKEN caller verification?
Callro reads the carrier's STIR/SHAKEN verification status (Passed, Failed, or Unverified) as reported by Android for each incoming call to assess caller legitimacy. Verified calls pass through, while unverified or failed calls are subjected to the full gauntlet.
Why does Callro charge $9.99 per month?
Callro charges a subscription rather than offering a free tier to eliminate the need for in-app advertising or data monetization. One job: the phone stays quiet.
Who operates the Callro application?
Callro is operated by Vindication Inc., a software development company based in St. Petersburg, Florida, focused on mobile security and privacy-first application design.
Key Takeaways
- Callro does not request access to your contacts, your phone's call log, or your microphone.
- The engine tests carrier STIR/SHAKEN verification status, VoIP gateway origins, and autodialer patterns.
- When Callro blocks or silences a call, your phone does not ring.
- Callro stops flagged calls from ringing your phone.
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