What Is Callro?
Callro is a privacy-first, on-device spam call blocking app for Android, developed by Vindication Inc. Callro uses a 26-layer Gauntlet Engine to evaluate and terminate incoming robocalls and scam calls locally before the phone rings, without requiring access to your contacts or uploading call audio.
Key Takeaways
- ✓On-Device Screening:Operates locally via Android's official ROLE_CALL_SCREENING API without uploading address books or call logs.
- ✓26-Layer Gauntlet Engine: Evaluates STIR/SHAKEN attestation, autodialer patterns, and carrier signaling in real time.
- ✓Zero Contacts Access: No READ_CONTACTS permission requested or required; address book entries always ring through normally.
- ✓Transparent Subscription: $9.99/month following a 7-day free trial with no credit card required upfront.
How Callro Works on Android
Unlike crowdsourced caller ID apps that upload your entire address book to central servers, Callro is engineered specifically for Android devices running Android 10 or later using the operating system's native CallScreeningService. Detailed specifications of this architecture are available in our guide to 26-layer Gauntlet Engine features.
When an incoming call arrives, Callro inspects carrier attestation headers, numbering plan rules, and autodialer frequency before the device alerts the user. Confirmed fraudulent robocalls and neighbor spoofing attempts are rejected via Intelligent Network Rejection (INR) without ringing through.
Company Background & Mission
Callro is developed and operated by Vindication Inc., a software technology company based in St. Petersburg, Florida. The product was built to protect seniors and family members from targeted telephone fraud. To learn more about our founding background and team, visit our About Vindication Inc. page.
For customer support inquiries, account assistance, or policy questions, users can contact the Vindication team directly at +1 (727) 354-3133 (Monday–Friday, 12:00 PM–9:00 PM ET) or via email at support@getcallro.com.
Pricing & Free Companion Tools
Callro charges a straightforward subscription fee of $9.99 per month. We do not monetize user data, sell advertising, or share call records with data brokers. Learn more about our subscription model on our transparent pricing page.
In addition to mobile call screening, Callro provides browser-based security utilities including the free Scam Call & Text Red-Flag Checker, allowing consumers to evaluate suspicious voicemails and transcripts instantly in their browsers.
Frequently Asked Questions
What is Callro?
Callro is a privacy-first, on-device spam call blocking application for Android developed by Vindication Inc. in St. Petersburg, FL. It intercepts spam calls before your phone rings without reading contacts.
Does Callro read or upload my contacts?
No. Callro operates without requesting the Android READ_CONTACTS permission. Your personal address book remains private on your phone.
How much does Callro cost?
Callro is $9.99/month following a 7-day free trial. You can start the trial without entering any credit card or payment information.
What phones are supported?
Callro supports Android devices running Android 10 or newer with Google Play Store access, including Samsung Galaxy, Google Pixel, Motorola, and other Android brands.
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