Android Spam Call Blocker.Hear the OnesThat Matter.

Free carrier and Android spam filters work off delayed, database-driven number reports — a call has to be reported as spam by other users before it gets flagged, which is why fresh spoofed numbers still get through. Callro's Gauntlet Engine evaluates the call's carrier certificate and behavioral signals in real time, on-device, so it doesn't need to wait for a number to build a bad reputation first. If your phone's built-in filter is already catching everything, you don't need Callro — it's built for people whose free filter is letting spoofed and rotating numbers through.

Download Callro, open it, and protection starts immediately. Your 7-day trial begins automatically — no credit card or payment information needed. After 7 days, subscribe for $9.99/month through Google Play, or the trial simply ends with no charge.

Not if your doctor's number is saved in your contacts — Android rings those calls directly and Callro never sees them. Numbers you've called before are also let through. A call from a number you've never saved or called goes through screening, so save important numbers (doctor, pharmacy, bank) to your contacts.

One primary role: Call Screening. On Android 13+, you will also see a prompt for Notifications so Callro can silently alert you to screened calls. That's it. Callro does not request the READ_CONTACTS or READ_CALL_LOG permissions. Everything runs on-device. Contacts, call logs, and audio never leave the device.

Google Play → Subscriptions → Callro → Cancel. Takes 30 seconds. No forms, no retention flows, no guilt trips. We want to earn your subscription every month.

Google Play's standard refund policy applies. You can cancel anytime from Google Play → Subscriptions → Callro → Cancel. If you have issues, email us at support@getcallro.com and we'll help.

Callro does not read your Android call history, contacts, or call audio, and the blocking decision is made on your phone. Limited data flows — such as blocked-call screening records — are described in our Privacy Policy.

No. Callro screens CALLS, not texts. Text message spam requires a completely different technical architecture that we do not build.

Yes — Callro runs on Samsung Galaxy and Google Pixel devices on Android 10 and above.

No. Callro uses Android's native Call Screening API to reject spam calls before your phone rings. The call is blocked at the OS level and doesn't reach your device — including your voicemail, in almost all cases. (Voicemail handling ultimately depends on your carrier, since it happens outside the app.)

No. Once set as your default Call Screening app, it runs silently in the background at the OS level. You can close the app and forget it's there.

No. Google Voice uses its own proprietary routing that bypasses Android's native Call Screening API. Callro only screens calls to your actual carrier SIM number.

No. The Gauntlet Engine only activates briefly when an unknown call comes in — there's no continuous background polling or location tracking.