# Storage Studio Pro vs Thetis Authenticator

The clearest difference is price: Thetis Authenticator at Free against Storage Studio Pro's $4.99. Thetis Authenticator also leads on iOS requirement (13.0 vs 15.6). Storage Studio Pro's advantage is update cadence (every 2 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

Thetis Authenticator is free to download; Storage Studio Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Storage Studio Pro ships an update every 2 months, Thetis Authenticator every 9 months. The most recent releases landed on September 19, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Storage Studio Pro | Thetis Authenticator |
| --- | --- | --- |
| Price | $4.99 | **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 | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | — | Free |
| Size | 5 MB | 3 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pablo Arista](https://appshunter.io/developer/912273635) | [Razzo Tech Corporation](https://appshunter.io/developer/1566501237) |

## What reviewers say

### Storage Studio Pro

[App page](https://appshunter.io/ios/app/storage-studio-pro/id1474185838)

**Features:** macOS Compatibility

**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 Storage Studio Pro free?

Storage Studio Pro costs $4.99, with no in-app purchases.

### Is Thetis Authenticator free?

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

### Do Storage Studio Pro or Thetis Authenticator have ads?

Neither Storage Studio Pro nor Thetis Authenticator shows ads.

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

Storage Studio Pro ships an update every 2 months, and Thetis Authenticator every 9 months. Most recently, Storage Studio Pro was updated on September 19, 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.*