CALLZ: global phone calls
Tools
Private US phonenumber, international calls ,No signups no accounts no password
- Downloads
- 14+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Oct 31
- 2026 · v14.0
Screenshots
About CALLZ: global phone calls
CALLZ:
Callz is a state-of-the-art VoIP calling application engineered from the ground up for absolute privacy and uncompromising security. Built on a strict Zero-Knowledge (ZK) architecture, Callz ensures that your voice communications remain completely private .
In a world of constant surveillance and data harvesting, Callz takes a radical approach: we do not want your personal information. There are no sign-ups, no email requirements, no passwords, and no SIM cards or phone numbers needed to use our service.
HOW IT WORKS
Callz operates on a secure, prepaid voucher system. Simply enter a generated voucher code to instantly instantiate a secure cryptographic identity on your device. Your balance is tied only to this mathematical identity—meaning it is cryptographically impossible for anyone, including us, to link your identity to your calls.
KEY FEATURES
• Zero-Knowledge Architecture: We don’t know who you are, who you are calling, or where you are calling from. Your private cryptographic seed never leaves your device.
• True privacy: No KYC, no phone numbers, no signups no passwords needed no personal data collection. Your Account ID is mathematically derived locally on your device.
• Advanced Cryptography: Powered by a high-performance Rust backend , Callz signs all network payloads locally using AES-256-GCM and encrypted local storage.
• Voucher-Based Access: Top up and manage your secure calling balance purely through anonymous voucher codes.
• Crystal Clear Audio: Built on robust, low-latency VoIP infrastructure for high-fidelity voice routing globally.
• Ephemeral Sessions: Logging out instantly wipes your local cryptographic session, leaving zero trace of your communications on the device.
YOUR PRIVACY,
Every connection to the network is authenticated via locally signed payloads. Because your private key is never transmitted, identity theft or backend tracing is mathematically impossible. Callz provides a secure line to the world without ever compromising your right to remain private.
Download Callz today and experience secure, communication.
Callz is a state-of-the-art VoIP calling application engineered from the ground up for absolute privacy and uncompromising security. Built on a strict Zero-Knowledge (ZK) architecture, Callz ensures that your voice communications remain completely private .
In a world of constant surveillance and data harvesting, Callz takes a radical approach: we do not want your personal information. There are no sign-ups, no email requirements, no passwords, and no SIM cards or phone numbers needed to use our service.
HOW IT WORKS
Callz operates on a secure, prepaid voucher system. Simply enter a generated voucher code to instantly instantiate a secure cryptographic identity on your device. Your balance is tied only to this mathematical identity—meaning it is cryptographically impossible for anyone, including us, to link your identity to your calls.
KEY FEATURES
• Zero-Knowledge Architecture: We don’t know who you are, who you are calling, or where you are calling from. Your private cryptographic seed never leaves your device.
• True privacy: No KYC, no phone numbers, no signups no passwords needed no personal data collection. Your Account ID is mathematically derived locally on your device.
• Advanced Cryptography: Powered by a high-performance Rust backend , Callz signs all network payloads locally using AES-256-GCM and encrypted local storage.
• Voucher-Based Access: Top up and manage your secure calling balance purely through anonymous voucher codes.
• Crystal Clear Audio: Built on robust, low-latency VoIP infrastructure for high-fidelity voice routing globally.
• Ephemeral Sessions: Logging out instantly wipes your local cryptographic session, leaving zero trace of your communications on the device.
YOUR PRIVACY,
Every connection to the network is authenticated via locally signed payloads. Because your private key is never transmitted, identity theft or backend tracing is mathematically impossible. Callz provides a secure line to the world without ever compromising your right to remain private.
Download Callz today and experience secure, communication.
What’s new
Version 14.0 · Updated October 31, 2026
Initial Release! get your. private US phone number in 20secounds No sign-ups, no accounts no passwords needed . Secure zero-knowledge VoIP calls. Enjoy crystal-clear audio, top-tier cryptography.your second phone number instantly.
User reviews
lifesaver .thank you
best skype replacement!thanx😊👍