Cerberus: Private Secure Chat
End-to-end encrypted messages
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Chats that start in person: show a code, scan it, talk. No phone number, no account. Try Pro free for 3 days.
Cerberus is a messenger for conversations that are nobody else's business.
Every message, voice note and file is encrypted on your phone and opened only on the phone of the person you are talking to. The server in between carries sealed data and holds no key to any of it — not as a promise not to look, but as a matter of what it has.
NO ACCOUNT, NO PHONE NUMBER, NO DIRECTORY
There is nothing to sign up for: no email, no SMS, no profile, no password. Nobody can look you up and nobody can add you. A conversation begins when two people are in the same room and one of them scans a code from the other's screen. That is the only way in, and it is the point.
WHAT IT PROTECTS
• End-to-end encryption with standard cryptography. Keys are generated on the device and stored in the Keychain — they never travel.
• The code you show is good once and for a few minutes. The two phones shake hands and move the conversation to a key that was never on any screen, so a code somebody photographed is worth nothing.
• A PIN or Face ID on the app itself.
• A second PIN for the situation nobody plans for: enter it and the app opens with every conversation hidden, or erases what is on the device, whichever you chose. It shows no error and no sign that another code exists.
• Screenshots do not pass silently: the other side is told.
• Messages delete themselves on a schedule you set — on both devices and on the server.
• A chat list that can show names only, for the moments when your screen is not only yours.
AND IT IS STILL A MESSENGER
Swipe a message to reply, hold one to react, send photos, videos, files and voice notes, delete anything on your phone or on both phones at once. Everything is where you expect it to be.
FREE, AND PRO
Two conversations, messages and reactions are free forever — a working messenger, not a trial. Pro adds unlimited conversations, voice notes, photos and files, and deleting on both phones. Take it monthly or yearly with a 3-day free trial, or pay once and keep it for good. Whatever Pro gains later is included at no extra cost.
Subscriptions renew automatically until you cancel them in your Apple ID settings. Terms of Use: https://zero-relay.fly.dev/terms
WHAT WE CANNOT DO
We cannot read your messages, recover them, or reset anything for you. Delete the app and every conversation goes with it: there is no backup, by design, and no way back. To destroy the keys as well, erase from inside the app first — Settings, Security, "Erase everything now". That is the trade this app makes, and it is written here rather than buried in a settings screen.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Cerberus Pro, now your way
• Monthly or yearly, with a 3-day free trial
• Or pay once and keep it for good
Pro is the same either way: unlimited conversations, voice notes, photos and files, and deleting on both phones.
Also in this version
• Ready for iOS 27
• Anonymous usage counts: only daily totals per step, with no identifier of any kind, so we can see where the app gets in the way. Details in the Privacy Policy.
• Fixes and improvements
The developer, Shahen Grigoryan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shahen Grigoryan
- Size
- 63.8 MB
- Category
- Social Networking
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Russian
- Age Rating
18+
- 18+
- Contains
Messaging and Chat
User-Generated Content
- In-App Purchases
Yes
- Cerberus Pro Monthly $2.99
- Cerberus Pro Yearly $14.99
- AirPact: Private Secure Chat $29.99
- Copyright
- © 2026 Shahen Grigoryan