# TEHTRIS MTD vs Perimify

The clearest difference is review sentiment: Perimify at 100% against TEHTRIS MTD's 33%. Perimify also leads on iOS requirement (12.2 vs 17.0). TEHTRIS MTD's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

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

TEHTRIS MTD ships an update every 2 months, Perimify every 5 weeks. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | TEHTRIS MTD | Perimify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/perimify/id1596161734/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 84 MB | 27 MB |
| Requires iOS | 17.0 | **12.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TEHTRIS](https://appshunter.io/developer/1517441870) | [Fathom Forward, Inc](https://appshunter.io/developer/1596162066) |

## What reviewers say

### TEHTRIS MTD

[App page](https://appshunter.io/ios/app/tehtris-mtd/id1517441871)

This application provides businesses with real-time protection and automated remediation against cyberattacks on employee mobile devices. It enhances security by reducing the attack surface and collecting security events for analysis on a unified platform. Users can easily initiate device scans and receive instant results.

**Highlights:** Real-time protection, Automated threat remediation, Reduced attack surface, Security event collection, One-click device scans, Unified platform alerts

**In-app purchases:** none


### Perimify

[App page](https://appshunter.io/ios/app/perimify/id1596161734)

Configure push notifications and manage your Perimify Hub. Monitor sensor status, review recent activity, and control notification sharing.

**Highlights:** Set up Perimify Hub, Configure push notifications, Check sensor status, View recent activity, Manage notification sharing

**In-app purchases:** none


## Frequently asked questions

### Is TEHTRIS MTD free?

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

### Is Perimify free?

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

### Do TEHTRIS MTD or Perimify have ads?

Perimify shows ads; TEHTRIS MTD does not.

### Which is updated more often, TEHTRIS MTD or Perimify?

TEHTRIS MTD ships an update every 2 months, and Perimify every 5 weeks. Most recently, TEHTRIS MTD was updated on October 2, 2026 and Perimify on October 15, 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.*