# Thetis Authenticator vs Secure Storage

The clearest difference is in-app purchases: Thetis Authenticator at none against Secure Storage's 3. Thetis Authenticator also leads on device support (3 vs 1) and iOS requirement (13.0 vs 26.0). Secure Storage's advantage is update cadence (daily vs every 9 months). On price and ads there is nothing between them.

Both are free to download. Secure Storage sells 3 in-app purchases, starting at $1.99 per month. Thetis Authenticator asks for nothing beyond the download.

Thetis Authenticator ships an update every 9 months, Secure Storage daily. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Thetis Authenticator | Secure Storage |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/thetis-authenticator/id6648759010/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Daily** |
| Monetization | Free | — |
| Size | 3 MB | 31 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Razzo Tech Corporation](https://appshunter.io/developer/1566501237) | [Souvik Biswas](https://appshunter.io/developer/1879710703) |

## What reviewers say

### 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


### Secure Storage

[App page](https://appshunter.io/ios/app/secure-storage-private-vault/id6794763277)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Thetis Authenticator free?

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

### Is Secure Storage free?

Secure Storage is free to download, with in-app purchases available.

### Do Thetis Authenticator or Secure Storage have ads?

Neither Thetis Authenticator nor Secure Storage shows ads.

### Which is updated more often, Thetis Authenticator or Secure Storage?

Thetis Authenticator ships an update every 9 months, and Secure Storage daily. Most recently, Thetis Authenticator was updated on November 4, 2026 and Secure Storage on November 6, 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.*