Hidden Mark:Transmission Tools

Secure&Creative Hidden Tools

Only for iPhone

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

iPhone

Hide private messages invisibly in images, audio & unseen QR codes. Full local processing, no uploads or tracking. Turn plain text into exclusive secret memories. HiddenMark is a creative privacy tool designed for iOS users. With the core concept of "Hidden Delivery, Private Enjoyment", it integrates three powerful features: Sound Mark, Image Hidden Text, and Invisible QR Code. All functions run 100% locally on your device — no data uploads, no network, no ads. We protect every private thought and secret you want to keep safe. Whether you’re sharing whispers with your partner, hiding surprises in photos, creating fun secret codes, or storing confidential information, HiddenMark turns text into an invisible carrier — only recognizable by this app, completely undetectable to others. Compatible with iOS 15.0+, supports English/Chinese auto-switch. Simple interface, zero learning curve. Unlock all features with an affordable subscription. Core Features Sound Mark: Turn text into inaudible sound waves, only decodable by HiddenMark. Save and share via AirDrop. Image Hidden Text: Embed text invisibly into images with zero visual changes. Perfect for secret messages and privacy storage. Invisible QR Code: Generate nearly invisible QR codes, scannable only by this app for private and fun sharing. Privacy Protection 100% Local Processing: No cloud, no data leakage. Minimal Permissions: Camera/photo access only when needed. Zero Data Collection: No login, no tracking, no personal info gathered. User Experience Single-page design, one-tap feature switching. Real-time feedback and clear error prompts. Native iOS saving & sharing, no ads or redirects. Who Is It For? Couples | Gen Z & Students | Privacy-Conscious Users | Global Users Why HiddenMark? All-in-one hidden messaging tool. True local privacy, no cloud risks. HiddenMark is more than a privacy app — it’s a creative way to connect emotionally. Download now and turn ordinary text into exclusive, private memories. Terms of Use: https://hiddenmark.cc/terms-of-service.html Privacy Policy: https://hiddenmark.cc/privacy-policy.html

Ratings & Reviews

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1、Added multi-language support 2、Fixed some minor bugs

Version 1.0.1

The developer, 鸿斌 唐, 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 Collected

    The developer does not collect any data from this app.

    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
    • 鸿斌 唐
    Size
    • 1.5 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 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 and 7 more
    • English, Arabic, French, German, Hindi, Simplified Chinese, Spanish, Thai
    Age Rating
    9+
    In-App Purchases
    Yes
    • Yearly Premium $9.99
    • Monthly Premium $2.99
    • Weekly Premium $1.99
    • Learn More
    Copyright
    • © 2026 summercotton Inc.
  • Developer Website
  • Privacy Policy

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