# Krypton vs OnOff for NFC Drives

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.

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.

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.

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.

## The numbers

| Metric | Krypton | OnOff for NFC Drives |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/krypton/id1529946598/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/onoff-for-nfc-drives/id6446581764/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 110 MB | 13 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steve Lidie](https://appshunter.io/developer/1869780159) | [LIANG HSIN CHEN](https://appshunter.io/developer/1678272117) |

## What reviewers say

### Krypton

[App page](https://appshunter.io/ios/app/krypton/id1529946598)

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:** Vision Pro support

**In-app purchases:** none


### OnOff for NFC Drives

[App page](https://appshunter.io/ios/app/onoff-for-nfc-drives/id6446581764)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*