DnDnApp

Dndn: Secure voice calls (VoIP).
No accounts required, absolute privacy with encrypted identity and your own dedicated Dndn number (or multiple numbers).
Zero-Knowledge Privacy:
We never collect your personal data or store your calls. Only the profile you choose is shared with the other party during the call. You can even make calls without entering any data at all—the other party will simply see your profile as a contact and can reach you as long as you allow your number to receive calls.
No Registration:
No email or phone number needed. Your identity is tied to your device, and you can add as many identities as you wish.
Smart Sharing:
Connect with others by scanning a QR code or simply copying and sharing your number.
Full Control:
You are in charge of backing up your data and managing your numbers.