Blank: Hide in Sound

Hide messages inside sound

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Hide a private message inside an ordinary sound. Encrypted on your device with your password. Share it anywhere, even chat apps. Only your recipient can reveal it. Blank hides private messages inside ordinary-sounding audio. Pick a sound, type a secret, set a password, and Blank gives you back a normal audio file with your message woven invisibly inside. Anyone can play it. Only someone with the password can reveal what is hidden. Everything happens on your device. Your messages and passwords never leave your iPhone. HOW IT WORKS • Encrypt: your message is sealed with AES-256 using your password. • Hide: the encrypted data is woven into the audio, inaudibly. • Reveal: open a Blank file, enter the password, read the message. FEATURES • Hide encrypted text inside 16-bit WAV audio • Seven built-in cover sounds (rain, waves, wind, stream, campfire, night, soft static), or import your own • On-device only. Nothing is ever uploaded. • A wrong password or an altered file is detected, never faked • Face ID app lock • Light and dark, clean and modern • Preview the audio in the app before you share SHARING IT SAFELY For AirDrop, Files, or email, share the audio file. To send it through a chat app like WhatsApp or Telegram, tap Send safely, which delivers the file without re-compressing it. A voice note or re-compressed audio erases the hidden message. BLANK PRO A one-time purchase unlocks unlimited message length. The free version hides short messages. Blank is a privacy and education tool built around classic audio steganography and modern encryption.

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Send it anywhere, and faster too. • New "Send safely" keeps your file intact through WhatsApp, Telegram, and other chat apps • Hiding and revealing are noticeably quicker • Four new cover sounds: wind, stream, campfire, and night • A quick walkthrough when you first open the app

Version 1.0.1

The developer, Joseph Emmanuel Deladem Kudjordji, 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:

    • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Joseph Emmanuel Deladem Kudjordji
Size
58.7 MB
Category
Utilities
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • iPad
    Requires iPadOS 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.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Joseph Emmanuel Deladem Kudjordji
  • Privacy Policy

    • More by Joseph Emmanuel Deladem Kudjordji

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