# SecurityKey NFC vs Thetis Authenticator

The clearest difference is rating: SecurityKey NFC at 5.0 against Thetis Authenticator's 3.5. SecurityKey NFC also leads on update cadence (every 3 weeks vs every 9 months). Thetis Authenticator's advantage is ratings volume (4 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SecurityKey NFC holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

SecurityKey NFC ships an update every 3 weeks, Thetis Authenticator every 9 months. The most recent releases landed on September 17, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SecurityKey NFC | Thetis Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/securitykey-nfc/id6473890284/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/thetis-authenticator/id6648759010/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Monetization | Free | Free |
| Size | 59 MB | 3 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AuthenTrend Technology Inc.](https://appshunter.io/developer/949786364) | [Razzo Tech Corporation](https://appshunter.io/developer/1566501237) |

## What reviewers say

### SecurityKey NFC

[App page](https://appshunter.io/ios/app/securitykey-nfc/id6473890284)

Manage your NFC device-bound Passkey with this app. Securely control your PIN code, fingerprint enrollment, and sign-in data for enhanced digital protection. Access your credentials from anywhere, anytime.

**Highlights:** PIN code management, Fingerprint enrollment, Sign-in data organization, NFC device integration, Secure credential management

**In-app purchases:** none


### Thetis Authenticator

[App page](https://appshunter.io/ios/app/thetis-authenticator/id6648759010)

Manage your FIDO2 security keys for passwordless login and two-factor authentication. Supports NFC and Type-C connections for seamless integration across devices. Offers one-time password management for services not yet supporting FIDO2.

**Highlights:** FIDO2 passwordless login, Enhanced two-factor authentication, One-time password management, Optimized for iPad, NFC and Type-C compatibility, Cross-platform support, Phishing-resistant authentication

**In-app purchases:** none


## Frequently asked questions

### Is SecurityKey NFC free?

SecurityKey NFC is free to download, with no in-app purchases.

### Is Thetis Authenticator free?

Thetis Authenticator is free to download, with no in-app purchases.

### Which has better reviews, SecurityKey NFC or Thetis Authenticator?

SecurityKey NFC is rated higher. SecurityKey NFC averages 5.0 out of 5 from 1 ratings, while Thetis Authenticator averages 3.5 from 4 ratings.

### Do SecurityKey NFC or Thetis Authenticator have ads?

Neither SecurityKey NFC nor Thetis Authenticator shows ads.

### Which is updated more often, SecurityKey NFC or Thetis Authenticator?

SecurityKey NFC ships an update every 3 weeks, and Thetis Authenticator every 9 months. Most recently, SecurityKey NFC was updated on September 17, 2026 and Thetis Authenticator on June 1, 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.*