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About Krypton

Protecting your personal and confidential information since 2009, Krypton is the first, simplest and most reliable App on the iOS Store to strongly encrypt entire documents and folders. Now also available on the macOS App Store. Your stuff is secure from prying eyes no matter where you are in the world. Metaphorically, Krypton keeps your encrypted items in a special vault, with each item contained in their own deposit box; to gain access to an encrypted item the vault must be open and the passcode key must be used to unlock the deposit box before you can discern the plaintext contents inside. In iOS the vault may be open or closed, while on macOS the vault opens upon Log In. Because the unit of encryption is an entire document or folder, Krypton is not a password manager in the traditional sense, although you can maintain a document of all your passwords that you encrypt between uses. Krypton can encrypt any type of document, including but not limited to: • Pictures and movies from your photo album. • Email messages from your mailbox. • Songs, PDFs, movies, Zip files, word processing documents, text files, images, program source code or any other object that you can download over the network or from your personal web server. • Anything on the iOS pasteboard. • Any document other Apps are willing to Share, such as Pages, Numbers and Keynote. • iCloud Drive and Dropbox files for easy cloud synchronization. Krypton uses strong encryption on each item. This has several ramifications: • If your passcode is strong enough to withstand a brute force attack, no one is going to see your stuff. • If you forget your passcode, no one can recover your stuff for you! But only that one document is lost, not your entire collection of items. • Your stuff is secure even if your iDevice or Mac is stolen, or iCloud Drive or Dropbox account is compromised. Visit http://www.bigcatos.com to learn more.

What’s new

Version 26.2 · Updated December 24, 2025

- Bug fixes and improvements. - Info action enhanced. - Refreshed documentation. - Update for DropBox SDK 7.4.1. - Update for Apple OS versions 26.1.

App privacy

The developer, Steve Lidie, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Krypton

Looking for apps like Krypton? Here are 6 similar apps on the App Store. The highest rated is Multi Search Engine (5.0/5), and 5 of the 6 are free to download.

Krypton vs. alternatives
App Rating Price Last updated Compare
Krypton 5.0 / 5 (2 ratings) 2.99 USD December 24, 2025
Easy Data Vault – Free Nov 29, 2024 Compare
Multi Search Engine 5.0 / 5 (1) 0.99 USD Nov 29, 2025 Compare
ScreenshotAI-AI assistant 5.0 / 5 (1) Free Apr 16, 2025 Compare
File Save: Private Vault – Free Aug 23, 2026 Compare
EMF Tracker – Free Sep 18, 2026 Compare
WeMacro 3.3 / 5 (4) Free Jun 6, 2026 Compare

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