# AF vs Bitdefender GravityZone MTD

The clearest difference is update cadence: Bitdefender GravityZone MTD at every 5 months against AF's every 38 months. Bitdefender GravityZone MTD also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.2). On price, ads and in-app purchases there is nothing between them.

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

AF ships an update every 38 months, Bitdefender GravityZone MTD every 5 months. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | AF | Bitdefender GravityZone MTD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/bitdefender-gravityzone-mtd/id6445922127/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 140 MB | 70 MB |
| Requires iOS | 16.2 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [john Cheng](https://appshunter.io/developer/1243789980) | [Zimperium](https://appshunter.io/developer/1030924458) |

## What reviewers say

### AF

[App page](https://appshunter.io/ios/app/af-21-iotstation/id1555390742)

**Features:** macOS Compatibility

**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 AF free?

AF 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.

### Do AF or Bitdefender GravityZone MTD have ads?

Neither AF nor Bitdefender GravityZone MTD shows ads.

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

AF ships an update every 38 months, and Bitdefender GravityZone MTD every 5 months. Most recently, AF was updated on October 25, 2026 and Bitdefender GravityZone MTD on October 14, 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.*