# Thetis Authenticator vs OpenCloud

The clearest difference is rating: OpenCloud at 4.2 against Thetis Authenticator's 3.5. OpenCloud also leads on update cadence (every 3 weeks vs every 9 months) and review sentiment (83% vs 60%). Thetis Authenticator's advantage is iOS requirement (13.0 vs 15.4). 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.

OpenCloud holds the better App Store score, 4.2 against 3.5. That said, the two scores are not equally well evidenced: OpenCloud has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 60% of Thetis Authenticator's written reviews are positive against 83% of OpenCloud's.

Thetis Authenticator ships an update every 9 months, OpenCloud every 3 weeks. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Thetis Authenticator | OpenCloud |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (4 ratings)](https://appshunter.io/ios/app/thetis-authenticator/id6648759010/reviews) | **[4.2 (21 ratings)](https://appshunter.io/ios/app/opencloud-your-data-anywhere/id6743121005/reviews)** |
| Number of ratings | 4 | **21** |
| Positive reviews | 60.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 3 MB | 26 MB |
| Requires iOS | **13.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Razzo Tech Corporation](https://appshunter.io/developer/1566501237) | [OpenCloud GmbH](https://appshunter.io/developer/1801492494) |

## 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


### OpenCloud

[App page](https://appshunter.io/ios/app/opencloud-your-data-anywhere/id6743121005)

Manage and collaborate on files with real-time synchronization and secure data rooms. Features smart search and integrated web office tools for seamless teamwork and digital sovereignty.

**Highlights:** Real-time file synchronization, Secure data rooms for collaboration, Full-text and metadata search, Integrated web office suite, Digital sovereignty

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thetis Authenticator free?

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

### Is OpenCloud free?

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

### Which has better reviews, Thetis Authenticator or OpenCloud?

OpenCloud is rated higher. Thetis Authenticator averages 3.5 out of 5 from 4 ratings, while OpenCloud averages 4.2 from 21 ratings.

### Do Thetis Authenticator or OpenCloud have ads?

Neither Thetis Authenticator nor OpenCloud shows ads.

### Which is updated more often, Thetis Authenticator or OpenCloud?

Thetis Authenticator ships an update every 9 months, and OpenCloud every 3 weeks. Most recently, Thetis Authenticator was updated on June 1, 2026 and OpenCloud on September 21, 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.*