# Zimperium MTD vs TD CRBS

The clearest difference is update cadence: Zimperium MTD at every 2 months against TD CRBS's every 17 months. Zimperium MTD also leads on device support (3 vs 1). TD CRBS's advantage is iOS requirement (11.4 vs 15.0). 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.

Zimperium MTD ships an update every 2 months, TD CRBS every 17 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Zimperium MTD | TD CRBS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (126 ratings)](https://appshunter.io/ios/app/zimperium-mtd/id1030924459/reviews)** | — |
| Number of ratings | **126** | — |
| Positive reviews | 23.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 17 months |
| Monetization | Free | — |
| Size | 66 MB | 19 MB |
| Requires iOS | 15.0 | **11.4** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zimperium](https://appshunter.io/developer/1030924458) | [Trusted Systems Limited](https://appshunter.io/developer/1459972363) |

## What reviewers say

### Zimperium MTD

[App page](https://appshunter.io/ios/app/zimperium-mtd/id1030924459)

This app offers comprehensive mobile security for enterprises, protecting employee devices and data from various cyber threats. It utilizes on-device machine learning to detect advanced attacks while prioritizing user privacy by not accessing personal communications or data.

**Highlights:** Device security, Network security, App security, Phishing protection, On-device machine learning, Privacy-first design

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

**In-app purchases:** none

**What reviewers like**

- 🔒 Protects against threats
- 🛡️ Amazing protection
- 👍 Great and easy to use
- 🔒 Saved from insecure WiFi
- 🛡️ Saved from bad QR codes

**What reviewers complain about**

- 🔋 Kills your battery
- 🔋 Battery drainer
- 🗑️ Rubbish app
- 🗑️ Completely useless
- 🐛 Buggy app

**Reported bugs**

- App is the root of frustrations
- Reports everything okay but Intune shows security problem
- Keeps giving false flag notifications
- Other apps not opening without this app
- App keeps running in background

**Requested features**

- Allow use of OneDrive
- Improve background refresh
- Improve performance and battery life


### TD CRBS

[App page](https://appshunter.io/ios/app/td-crbs/id1542916422)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zimperium MTD free?

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

### Is TD CRBS free?

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

### Do Zimperium MTD or TD CRBS have ads?

Neither Zimperium MTD nor TD CRBS shows ads.

### Which is updated more often, Zimperium MTD or TD CRBS?

Zimperium MTD ships an update every 2 months, and TD CRBS every 17 months. Most recently, Zimperium MTD was updated on November 1, 2026 and TD CRBS on November 3, 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.*