Launching today

Callro

Launching today

Privacy-first Android spam call blocker

1 follower

Privacy-first Android spam call blocker

1 follower

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Callro is an on-device spam call blocker for Android that evaluates incoming calls locally using a 26-layer Gauntlet Engine. Unlike legacy call blockers, it requires zero contact address book access and never uploads your call logs or audio to external servers.

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Launch tags:Android•Privacy•Security

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Hi Product Hunt! 👋 We built Callro because legacy spam call blockers have a major privacy paradox: to block spam calls, they demand full READ_CONTACTS permission and upload your entire address book and call logs to centralized cloud servers. You essentially trade your personal privacy to stop spam. We engineered Callro from the ground up to be 100% on-device. Using Android's native ROLE_CALL_SCREENING API, our 26-layer Gauntlet Engine evaluates incoming calls locally in real time before your phone rings—analyzing STIR/SHAKEN carrier attestation, behavioral dialing patterns, and neighbor spoofing. Your contacts, call logs, and call audio never leave your device. We'd love to hear your feedback and answer any questions!

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2d ago