CryptoSafe

CryptoSafe

Offline AES-256-GCM text encryption with Argon2id, no internet permission

nemoXdev Text Encryption

Screenshots

Screenshot of CryptoSafe Screenshot of CryptoSafe Screenshot of CryptoSafe Screenshot of CryptoSafe Screenshot of CryptoSafe Screenshot of CryptoSafe Screenshot of CryptoSafe

Description

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.

What’s new (2.1.1)

• Encrypted Boxes (Chat) with per-box passwords
• App Lock with PIN and Biometric unlock
• Encrypted database (SQLCipher)
• Receive encrypted texts from other apps
• Share encrypted texts from a message box with other apps
• Auto-delete messages (1h to 90 days)
• Settings screen
• Help & Guide screen with detailed documentation

Versions

Version Date Size Requires Android Download
2.1.1 current
0626177f888560db…
2026-08-13 10 MB API 24
2.0.0
d7b17dba755d64e2…
2026-08-10 10 MB API 24
1.3.0
c9b9980a1b62a652…
2026-07-20 2.4 MB API 24

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • BiometricsUnlock with fingerprint or face.
  • FingerprintUnlock with a fingerprint.
  • Prevent sleepingKeep the device from going to sleep.
  • Run at startupStart automatically after the device is switched on.
  • Foreground serviceKeep running in the background, visible in the status bar.
  • app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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