Panic Mode
Two passwords: one opens the app, the other wipes it while simulating normal operation. The attacker sees nothing.
Product
OV Message
Encrypted messaging, 100% offline.
Encrypts your SMS end-to-end. A password, a key, a contact, and every conversation becomes private. No account, no sign-up, no server.
Available on Google PlayPromo codes
Download it for free
Get OV Message for free on Google Play. Click an available code to redeem it. First come, first served.
Show promo codes48 available
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What sets it apart
Designed for real privacy
Not marketing promises: concrete security mechanisms, from encryption to protection in case of loss or theft.
Post-quantum pairing
Remote key exchange via SMS, serverless. Hybrid ML-KEM-768 + X25519, resistant to tomorrow's quantum computers.
Fortress Mode
Reception filter: anything not encrypted, signed, and fully decryptable is automatically deleted.
Key protection
Your keys are encrypted with your password. If your phone is lost or stolen, they remain unusable without it.
Ephemeral messages
Auto-deletion per contact, from 5 minutes to 1 week. Messages disappear without a trace or intervention.
Pool of 500 keys
500 pre-generated keys per contact. Change keys remotely by simply communicating its number. No need to meet again.
.ov files
Encrypt any file with AES-256-GCM and share it anywhere (WhatsApp, email, cloud). Only the key decrypts.
Default SMS app
Replaces your SMS app: encrypted and regular messages together in a single interface.
OVNY Mode
Forces sending only encrypted. Any plaintext message is automatically blocked, impossible to send in the clear by mistake.
Under the hood
The tech
The cryptographic building blocks that protect your messages.
ML-KEM-768 + X25519AES-256-GCMArgon2idSHA-256SHA3-256HKDF-SHA256HMAC-SHA256
Technical white paper
The cryptographic architecture and design decisions, in detail.
Screenshots
The interface
Encryption made simple, accessible to everyone.
How it works
Three steps
Communicate securely, without technical skills.
01
Install
Download the app. A password protects access in seconds.
02
Exchange a key
In person via QR code, or remotely via post-quantum pairing: exchange by SMS then voice verification of a 12-character hex code.
03
Communicate
Send and receive end-to-end encrypted messages. Only your contact can read them.
And also
Much more
Panic KeysAnti-screenshotBlocked cloud backupsPrivate notificationsAnti-replay protectionTwo encoding modesAuto-lock