# Rublon Authenticator vs Bitdefender GravityZone MTD

The clearest difference is rating: Bitdefender GravityZone MTD at 4.0 against Rublon Authenticator's 3.1. Bitdefender GravityZone MTD also leads on iOS requirement (12.0 vs 15.1). Rublon Authenticator's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (8 vs 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.

Bitdefender GravityZone MTD holds the better App Store score, 4.0 against 3.1. That said, the two scores are not equally well evidenced: Rublon Authenticator has 8 ratings behind it against 1, so its average is the more settled of the two.

Rublon Authenticator ships an update every 3 weeks, Bitdefender GravityZone MTD every 5 months. The most recent releases landed on August 26, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Rublon Authenticator | Bitdefender GravityZone MTD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (8 ratings)](https://appshunter.io/ios/app/rublon-authenticator/id1434412791/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/bitdefender-gravityzone-mtd/id6445922127/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 37 MB | 70 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rublon Sp. z o.o.](https://appshunter.io/developer/500136555) | [Zimperium](https://appshunter.io/developer/1030924458) |

## What reviewers say

### Rublon Authenticator

[App page](https://appshunter.io/ios/app/rublon-authenticator/id1434412791)

This app provides two-factor authentication for secure remote access. It allows users to approve logins directly from their mobile device, even without an internet connection.

**Highlights:** Two-factor authentication, Secure remote access, Offline login approval, Mobile device integration

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

**In-app purchases:** none


### Bitdefender GravityZone MTD

[App page](https://appshunter.io/ios/app/bitdefender-gravityzone-mtd/id6445922127)

This mobile security solution defends corporate and personal devices against phishing, zero-day threats, and advanced cyberattacks. It offers robust protection for applications, web traffic, and the device itself, while strictly safeguarding employee privacy and personal data.

**Highlights:** Mobile threat defense, Phishing protection, Zero-day threat detection, Application security, Web traffic protection, Privacy safeguarding

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rublon Authenticator free?

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

### Is Bitdefender GravityZone MTD free?

Bitdefender GravityZone MTD is free to download, with no in-app purchases.

### Which has better reviews, Rublon Authenticator or Bitdefender GravityZone MTD?

Bitdefender GravityZone MTD is rated higher. Rublon Authenticator averages 3.1 out of 5 from 8 ratings, while Bitdefender GravityZone MTD averages 4.0 from 1 ratings.

### Do Rublon Authenticator or Bitdefender GravityZone MTD have ads?

Neither Rublon Authenticator nor Bitdefender GravityZone MTD shows ads.

### Which is updated more often, Rublon Authenticator or Bitdefender GravityZone MTD?

Rublon Authenticator ships an update every 3 weeks, and Bitdefender GravityZone MTD every 5 months. Most recently, Rublon Authenticator was updated on August 26, 2026 and Bitdefender GravityZone MTD on August 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.*