# Krypton — Personal Privacy Agent

> Encrypts documents and folders for personal privacy and security. (iPhone/iPad app by Steve Lidie.)

- Source: https://appshunter.io/ios/app/krypton/id1529946598 (this page in markdown: same URL + `.md`)
- Developer: [Steve Lidie](https://appshunter.io/developer/1869780159)
- Category: Utilities, Productivity
- Price: $2.99 (on sale, was $4.99)
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 14.0 · 110 MB
- Languages: American English
- Released: 2020-08-31
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/krypton/id1529946598/reviews.md

## What is 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.

## Key features

- Strong encryption for documents and folders
- Acts as a secure digital vault
- Supports various file types (pictures, movies, PDFs, etc.)
- Cloud synchronization with iCloud Drive and Dropbox
- Available on iOS and macOS


## Frequently asked questions about Krypton

### What is Krypton?

Krypton is a personal privacy agent designed to strongly encrypt entire documents and folders, keeping your confidential information secure from prying eyes. It functions like a digital vault for your sensitive files.

### How does Krypton protect my files?

Krypton uses strong encryption on each item. If your passcode is strong enough to withstand brute force attacks, your data is secure. This protection extends even if your device or cloud accounts are compromised.

### Can Krypton encrypt any type of file?

Yes, Krypton can encrypt any type of document, including pictures, movies, emails, PDFs, songs, Zip files, word processing documents, text files, program source code, and anything else you can share or download.

### What happens if I forget my Krypton passcode?

If you forget your passcode, no one can recover your encrypted items for you. However, only the specific document you forgot the passcode for will be lost, not your entire collection.

### Is Krypton available on multiple devices?

Yes, Krypton is available on the iOS App Store for iPhone, iPad, and iPod, and also on the macOS App Store for your Mac computers.

### Does Krypton have ads?

No, Krypton does not contain advertisements. It is a paid application focused on providing a secure and uninterrupted user experience for file encryption.

### How often is Krypton updated?

Krypton was last updated on December 24, 2025, with version 26.2. This indicates a commitment to maintaining and improving the application's functionality and security.

### What is the price of Krypton?

Krypton is a paid application priced at $2.99. This one-time purchase grants you access to its full suite of personal privacy and encryption features.

## Version history (last 5 releases)

### 26.2 — 2025-12-24

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

### 8.2.1 — 2022-10-12

- iOS 16 security changes to Mobile Safari broke the display of some types of plaintext.
- Minimum iOS version is 11.0.
- Update for iOS 16.0.2.

### 8.2 — 2022-03-03

- Minor bug fixes and improvements.
- Update for iOS 15.3.1, macOS 12.2.1.

### 8.1 — 2021-02-07

- Krypton now uses short-lived Dropbox tokens, which means you will have to re-authenticate occasionally.
- New macOS Universal binary that runs on either Apple Silicon or Intel Macs.
- Update for iOS 14.4, macOS 11.2.

### 8.0 — 2020-09-02

No release notes.

## Apps similar to Krypton

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| --- | --- | --- | --- |
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| [Direct Info](https://appshunter.io/ios/app/direct-info/id959526801) | — | $2.99 | Utilities |
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| [DOM Update](https://appshunter.io/ios/app/dom-update/id1668985801) | — | Free | Utilities |
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## More apps by Steve Lidie

- [GO-21 SciRPN](https://appshunter.io/ios/app/go-21-scirpn/id327651563)
- [GO-25 SciRPN](https://appshunter.io/ios/app/go-25-scirpn/id408249517)
- [Photo Gopher](https://appshunter.io/ios/app/photo-gopher/id662735770)
- [Solar Coaster](https://appshunter.io/ios/app/solar-coaster/id1218422388)
- [GO-29 SciRPN](https://appshunter.io/ios/app/go-29-scirpn/id1472811056)

All apps by Steve Lidie: https://appshunter.io/developer/1869780159

## Related topics

[krypton](https://appshunter.io/ios/topics/krypton)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*