CryptoSafe
Offline AES-256-GCM text encryption with Argon2id, no internet permission
Version: 2.1.1
Added: 01-07-2026
Updated: 13-08-2026
Added: 01-07-2026
Updated: 13-08-2026
CryptoSafe is a fully offline app for encrypting and decrypting text. It doesn't use the internet at all, and everything stays on your phone.
Features:
• Anonymous Boxes: chat in password-protected boxes, each with its own password
• Strong encryption: AES-256-GCM with Argon2id key derivation
• App Lock: PIN and fingerprint unlock with an auto-lock timer
• Encrypted database (SQLCipher): nothing is stored in plaintext
• Share into a box: receive encrypted texts from WhatsApp, Telegram and other apps directly into a box
• Share from a box: share encrypted texts from a message box with other apps
• Auto-delete messages (from 1 hour to 90 days)
• Box lock modes: ask every time, remember for a while, keep for the session, or remember permanently
• Built-in password generator with strength indicator
• Screenshot protection on every screen
• Help & Guide screen with detailed documentation
• Translated into 15 languages
Help us improve: report issues or suggest features at https://github.com/nemoXdev/CryptoSafe/issues, or contribute a translation at https://github.com/nemoXdev/CryptoSafe/blob/develop/app/src/main/assets/locales/README.md. With your contribution, the app keeps getting better.
Features:
• Anonymous Boxes: chat in password-protected boxes, each with its own password
• Strong encryption: AES-256-GCM with Argon2id key derivation
• App Lock: PIN and fingerprint unlock with an auto-lock timer
• Encrypted database (SQLCipher): nothing is stored in plaintext
• Share into a box: receive encrypted texts from WhatsApp, Telegram and other apps directly into a box
• Share from a box: share encrypted texts from a message box with other apps
• Auto-delete messages (from 1 hour to 90 days)
• Box lock modes: ask every time, remember for a while, keep for the session, or remember permanently
• Built-in password generator with strength indicator
• Screenshot protection on every screen
• Help & Guide screen with detailed documentation
• Translated into 15 languages
Help us improve: report issues or suggest features at https://github.com/nemoXdev/CryptoSafe/issues, or contribute a translation at https://github.com/nemoXdev/CryptoSafe/blob/develop/app/src/main/assets/locales/README.md. With your contribution, the app keeps getting better.