# Thetis Authenticator vs dun.

The clearest difference is rating: dun. at 5.0 against Thetis Authenticator's 3.5. dun. also leads on update cadence (every 6 weeks vs every 9 months). Thetis Authenticator's advantage is ratings volume (4 vs 1) and iOS requirement (13.0 vs 15.1). 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.

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

Thetis Authenticator ships an update every 9 months, dun. every 6 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Thetis Authenticator | dun. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (4 ratings)](https://appshunter.io/ios/app/thetis-authenticator/id6648759010/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dun/id6769227223/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 3 MB | 25 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Razzo Tech Corporation](https://appshunter.io/developer/1566501237) | [Shobhit Varshney](https://appshunter.io/developer/1896641714) |

## 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


### dun.

[App page](https://appshunter.io/ios/app/dun/id6769227223)

This app simplifies homework management by allowing users to input assignments via voice. It uses AI to organize tasks, estimate completion times, and present them one at a time. A built-in study timer and optional school integration further streamline academic organization.

**Highlights:** Voice input for assignments, AI-powered task organization, Single-task display, Built-in study timer, School assignment import (Blackbaud)

**Features:** macOS Compatibility, 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 dun. free?

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

### Which has better reviews, Thetis Authenticator or dun.?

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

### Do Thetis Authenticator or dun. have ads?

Neither Thetis Authenticator nor dun. shows ads.

### Which is updated more often, Thetis Authenticator or dun.?

Thetis Authenticator ships an update every 9 months, and dun. every 6 weeks. Most recently, Thetis Authenticator was updated on October 10, 2026 and dun. on October 12, 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.*