# Auth0 Guardian vs Thomson Reuters Authenticator

The clearest difference is rating: Auth0 Guardian at 2.4 against Thomson Reuters Authenticator's 1.2. Thomson Reuters Authenticator's advantage is ratings volume (1.8K vs 113). On price, review sentiment, update cadence and ads there is nothing between them.

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

Auth0 Guardian holds the better App Store score, 2.4 against 1.2. That said, the two scores are not equally well evidenced: Thomson Reuters Authenticator has 1.8K ratings behind it against 113, so its average is the more settled of the two. Written reviews point the same way: 15% of Auth0 Guardian's written reviews are positive against 11% of Thomson Reuters Authenticator's.

Auth0 Guardian ships an update every 3 months, Thomson Reuters Authenticator every 5 months. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Auth0 Guardian | Thomson Reuters Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.4 (113 ratings)](https://appshunter.io/ios/app/auth0-guardian/id1093447833/reviews)** | [1.2 (1.8K ratings)](https://appshunter.io/ios/app/thomson-reuters-authenticator/id1155604687/reviews) |
| Number of ratings | 113 | **1.8K** |
| Positive reviews | **14.6% of reviews** | 10.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 20 MB | 6 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Auth0](https://appshunter.io/developer/1076692516) | [Thomson Reuters](https://appshunter.io/developer/314213170) |

## What reviewers say

### Auth0 Guardian

[App page](https://appshunter.io/ios/app/auth0-guardian/id1093447833)

This app provides multi-factor authentication by sending push notifications to your device for easy approval or denial of account access. It can also generate one-time passwords for secure logins.

**Highlights:** Push notification authentication, Allow/deny account access, One-time password generation, Multi-factor authentication, Secure login

**Features:** Vision Pro support

**In-app purchases:** none


### Thomson Reuters Authenticator

[App page](https://appshunter.io/ios/app/thomson-reuters-authenticator/id1155604687)

This app provides an additional layer of security for accessing Thomson Reuters software. It uses multi-factor authentication to verify your identity, protecting your data with a combination of something you know, have, and are.

**Highlights:** Multi-factor authentication, Secure data protection, Approve/ignore sign-on requests, Automatic setup via QR code, Support for multiple accounts, Offline code generation

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy setup
- 🔒 Secure authentication
- 👍 Works as expected

**What reviewers complain about**

- 🐛 Difficult to migrate to new device
- 👎 Unintuitive and confusing
- 🤯 Impossible to use without corporate account

**Reported bugs**

- QR code not working or unavailable
- Fails to authenticate even with correct credentials
- Permanently locked out after device change

**Requested features**

- Ability to delete old accounts
- Clearer instructions and documentation
- Notification support for approvals


## Frequently asked questions

### Is Auth0 Guardian free?

Auth0 Guardian is free to download, with no in-app purchases.

### Is Thomson Reuters Authenticator free?

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

### Which has better reviews, Auth0 Guardian or Thomson Reuters Authenticator?

Auth0 Guardian is rated higher. Auth0 Guardian averages 2.4 out of 5 from 113 ratings, while Thomson Reuters Authenticator averages 1.2 from 1.8K ratings.

### Do Auth0 Guardian or Thomson Reuters Authenticator have ads?

Neither Auth0 Guardian nor Thomson Reuters Authenticator shows ads.

### Which is updated more often, Auth0 Guardian or Thomson Reuters Authenticator?

Auth0 Guardian ships an update every 3 months, and Thomson Reuters Authenticator every 5 months. Most recently, Auth0 Guardian was updated on September 17, 2026 and Thomson Reuters Authenticator 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.*