Comparison

Krypton vs OnOff for NFC Drives

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Krypton

Securely encrypt and protect your personal documents and folders with strong encryption. This app acts like a digital vault, keeping your sensitive files safe from unauthorized access on your devices and cloud storage.

Highlights
  • 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
Features
Read full description

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.

About

OnOff for NFC Drives

Securely lock and unlock USB drives with a simple tap of your NFC-enabled smartphone. Protect your data on the go with this easy-to-use utility, offering custom profiles and broad USB drive compatibility.

Highlights
  • NFC drive locking and unlocking
  • Data security on the go
  • Customizable drive profiles
  • User-friendly interface
  • Wide USB drive compatibility
  • Lightweight and no extra hardware needed
Read full description

OnOff App is a revolutionary application that allows users to work with USB drives in a completely new way. The app is designed to integrate NFC capability, enabling users to lock and unlock the drive with a simple tap. With this app, users can now keep their data safe and secure while on the go. The OnOff App is perfect for people who are always on the move and need a reliable way to store and transport their data. It is also ideal for individuals who are concerned about the security of their data and want an easy way to protect it. This app offers a secure way to store and access data from a USB drive, ensuring that important files are never lost or stolen. The app works by using the NFC capability of a user's smartphone or other mobile device. When the user wants to access the USB drive, they simply tap their smartphone or mobile device against the drive. This activates the OnOff App, allowing the user to unlock the drive and access their data. Once the user is finished using the USB drive, they can simply tap their smartphone or mobile device against the drive again to lock it. This ensures that the data on the drive is secure and protected from unauthorized access. The OnOff App is incredibly easy to use, making it perfect for users of all ages and technical abilities. It is also very lightweight and does not require any additional hardware or software to be installed on the user's device. This makes it incredibly convenient and easy to use, whether at home, in the office, or on the go. In addition to its NFC capability, the OnOff App also offers a range of other features and benefits. For example, it allows users to create custom profiles for their USB drives, so they can easily access their most important files and folders. It also offers an intuitive and user-friendly interface, making it easy to navigate and use. Another great feature of the OnOff App is its compatibility with a wide range of USB drives. Whether the user has a USB drive from a well-known manufacturer or a lesser-known brand, they can rest assured that the OnOff App will work seamlessly with their device. Overall, the OnOff App is an incredible tool for anyone who needs a secure and reliable way to store and access their data. With its NFC capability, easy-to-use interface, and range of other features and benefits, this app is a must-have for anyone who values their data and wants to keep it safe and secure.

Screenshots

Krypton4 screens
OnOff for NFC Drives3 screens

Verdict

The call

The clearest difference is price: OnOff for NFC Drives at Free against Krypton's $2.99. OnOff for NFC Drives also leads on update cadence (every 3 months vs every 10 months). Krypton's advantage is device support (4 vs 2). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

OnOff for NFC Drives is free to download; Krypton costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Krypton against 5.0 for OnOff for NFC Drives. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Krypton ships an update every 10 months, OnOff for NFC Drives every 3 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 5 level
Krypton versus OnOff for NFC Drives: the parameters behind the verdict, then further details
ParameterKryptonOnOff for NFC Drives
Price$2.99Free — better
Rating5.0 (2 ratings)5.0 (1 ratings)
Number of ratings2 — better1
Update frequencyEvery 10 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS14.014.0
Further details — not scored
Size110 MB13 MB
Age rating4+4+
DeveloperSteve LidieLIANG HSIN CHEN

Customer experience

Krypton

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

OnOff for NFC Drives

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Krypton

No in-app purchases

None

OnOff for NFC Drives

No in-app purchases

Questions

Is Krypton free?
Krypton costs $2.99, with no in-app purchases.
Is OnOff for NFC Drives free?
OnOff for NFC Drives is free to download, with no in-app purchases.
Which has better reviews, Krypton or OnOff for NFC Drives?
Krypton and OnOff for NFC Drives are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Krypton or OnOff for NFC Drives have ads?
Neither Krypton nor OnOff for NFC Drives shows ads.
Which is updated more often, Krypton or OnOff for NFC Drives?
Krypton ships an update every 10 months, and OnOff for NFC Drives every 3 months. Most recently, Krypton was updated on October 24, 2026 and OnOff for NFC Drives on October 10, 2026.

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