PS: Post Scriptum
Your secure communication, fully encrypted in one place
About PS: Post Scriptum
PS: Post Scriptum is a privacy-focused mobile app from Slovak encryption company Salutis Systems that secures calls, chat messages, photos, files, and passwords using a combination of symmetric AES and asymmetric ECC encryption. It is designed for full anonymity with no SIM required, no backdoors, and no third-party access, deleting messages from servers once delivered. The app acts as both an encrypted messenger and a secure vault for sensitive documents.
Pros & Cons
Pros
- Combines AES and ECC encryption for both communication and stored files
- No SIM or phone number required to register
- Free to use for core encrypted messaging and calls
- Acts as both a secure messenger and an encrypted document vault
- Developer states it collects no user data
Cons
- Proprietary and closed-source, so encryption cannot be independently audited
- Small user base limits the value of an encrypted network
- Android version appears delisted from Google Play; iOS remains the primary platform
- Infrequent updates compared to mainstream secure messengers
- Limited public documentation about the underlying protocol
Key Features
Encrypted calls and messages
Real-time voice calls and chat secured with combined AES (symmetric) and ECC (asymmetric) encryption.
No SIM required
Works over a data connection without needing a phone number or SIM card to register and communicate.
Secure file and password vault
Store photos, videos, PDFs, files, and passwords in one encrypted location on your device.
Full anonymity
Grants 100% anonymity with the option to choose whether you are visible to other users.
No backdoors
No backdoor or third-party access to your data, and messages are deleted from servers once delivered.
Simple setup
Quick account creation and an easy-to-use interface for non-technical users.
Cross-platform
Available for iOS and Android smartphones and tablets, backed by a Windows desktop encryption ecosystem.
Pricing
- Encrypted calls and messages
- No SIM required
- Full anonymity
- No backdoors or third-party access
- Everything in Free
- Encrypted storage for passwords
- Encrypted storage for photos and files
- One-time in-app purchase
Best For
Private personal messaging
Individuals who want end-to-end encrypted calls and chats without tying an account to a phone number.
Secure document vault
Storing sensitive photos, files, and passwords in one encrypted place on a mobile device.
Anonymous communication
Communicating with full anonymity and control over visibility to other users.
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