# Perimeter vs Duo Auty 2FA

The clearest difference is in-app purchases: Perimeter at none against Duo Auty 2FA's 2. Perimeter also leads on update cadence (every 3 weeks vs every 8 months) and iOS requirement (11.0 vs 14.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Duo Auty 2FA sells 2 in-app purchases, starting at $9.99 per month. Perimeter asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Perimeter against 5.0 for Duo Auty 2FA. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Perimeter ships an update every 3 weeks, Duo Auty 2FA every 8 months. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Perimeter | Duo Auty 2FA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/perimeter-theft-deterrence/id1572482501/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/duo-auty-2fa-secure-pass/id6480926410/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | **Free** | Subscription |
| Size | 54 MB | 50 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | +17 |
| Developer | [PERIMETER AI INC.](https://appshunter.io/developer/1572482503) | [Gurman Galychina LLC](https://appshunter.io/developer/1450092250) |

## What reviewers say

### Perimeter

[App page](https://appshunter.io/ios/app/perimeter-theft-deterrence/id1572482501)

This AI-powered security app detects potential threats before they occur. It uses unique lights and sounds to warn individuals and deter crime before it happens.

**Highlights:** AI threat detection, Proactive crime deterrence, Neighbor Safe™ lights, Audible warnings, Driveway monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


### Duo Auty 2FA

[App page](https://appshunter.io/ios/app/duo-auty-2fa-secure-pass/id6480926410)

Enhance your online security with this two-factor authentication app. It supports time-based one-time passwords (TOTP) and PUSH authentication for seamless and secure access to your accounts. Add multiple accounts, customize with brand icons, and unlock with biometrics.

**Highlights:** Two-factor authentication (2FA), TOTP and PUSH authentication, QR code scanning and import, Manual code entry, Brand icon customization, Biometrics integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly with trial | $9.99 | per month |
| Yearly plan with trial | $59.99 | per year |


## Frequently asked questions

### Is Perimeter free?

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

### Is Duo Auty 2FA free?

Duo Auty 2FA is free to download, with in-app purchases available.

### Which has better reviews, Perimeter or Duo Auty 2FA?

Perimeter and Duo Auty 2FA are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do Perimeter or Duo Auty 2FA have ads?

Neither Perimeter nor Duo Auty 2FA shows ads.

### Which is updated more often, Perimeter or Duo Auty 2FA?

Perimeter ships an update every 3 weeks, and Duo Auty 2FA every 8 months. Most recently, Perimeter was updated on October 7, 2026 and Duo Auty 2FA on October 24, 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.*