Spam Blocker keeps unwanted calls and text messages off your phone using a stack of filters you control — number patterns, regular expressions, contact rules, time windows and carrier-level checks. Nothing is uploaded to decide whether a call is spam; every rule runs on your device.
There is no blocklist subscription, no account, no advertising and no analytics. You can read exactly how each decision is made, and change it.
Stack number, contact, content and time-based rules to decide what gets through.
Write your own patterns for numbers and message bodies when the presets aren't enough.
Use carrier caller-ID attestation to catch spoofed numbers.
Rate-limit floods of messages from unknown senders.
Temporarily silence everything except the contacts you choose.
Call and message data is never uploaded. No account, no server, no tracking.
Spam Blocker is built by PiTech from the open-source project SpamBlocker by aj3423, released under the MIT license. We are grateful to the original author and the open-source community. PiTech is not affiliated with or endorsed by the original developer.
Original source: https://github.com/aj3423/SpamBlocker
PiTech maintains this app in the spirit of the MIT license and publishes its modifications on
our GitHub.
Spam Blocker is free, open-source and ad-free — and we intend to keep it that way. Sponsor PiTech's open-source app program to help fund development, maintenance and new privacy-respecting apps.
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