Blocks before ringing
Unknown and private numbers can be rejected before the phone rings.
Quiet protection for every call
Your contacts ring. Unknown callers stay out.
CallGuard checks incoming calls on your phone and blocks numbers that are not in your contacts before they disturb you.
CallGuardby Piza TecnologiaOn-device verification
CallGuard
Protection designed to be simple
Once configured, CallGuard works quietly in the background.
Recognizes your contacts
Country codes, area codes, prefixes, and local formats are compared securely.
Reports on the device
Review blocked attempts and share a report showing how many calls came from each number.
3 steps
How it works
- 1Confirm your number’s country.
- 2Authorize contacts and call screening.
- 3Turn on protection and let CallGuard work.
Privacy by design
Your address book does not go to our server.
Contact matching and call history remain on the device. The server stores only what is necessary for licensing, purchase validation, legal acceptance, and administration.
Privacy Policy →Need help with CallGuard?
Our support channel can help with setup, licenses, and purchase questions.