# TruGrid Authenticator vs Easy Duct

The clearest difference is update cadence: Easy Duct at every 2 days against TruGrid Authenticator's monthly. Easy Duct also leads on rating (5.0 vs 4.7). TruGrid Authenticator's advantage is ratings volume (16 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.

Easy Duct holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: TruGrid Authenticator has 16 ratings behind it against 1, so its average is the more settled of the two.

TruGrid Authenticator ships an update monthly, Easy Duct every 2 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | TruGrid Authenticator | Easy Duct |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (16 ratings)](https://appshunter.io/ios/app/trugrid-authenticator/id1383287900/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/easy-duct/id6810881020/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free | Free |
| Size | 33 MB | 3 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [N.E. Desktop Software, Inc. ("TruGrid")](https://appshunter.io/developer/1372930779) | [Iman Alizadeh](https://appshunter.io/developer/6810881022) |

## What reviewers say

### TruGrid Authenticator

[App page](https://appshunter.io/ios/app/trugrid-authenticator/id1383287900)

Enhance your online security with this multi-factor authentication app. It generates one-time passcodes for logging into accounts, providing an extra security layer even if your password is compromised. Works offline and supports any TOTP-compatible sites.

**Highlights:** Multi-factor authentication, TOTP-based security, Offline passcode generation, QR code setup, Multiple account support, Account nickname editing, PIN code protection

**In-app purchases:** none


### Easy Duct

[App page](https://appshunter.io/ios/app/easy-duct/id6810881020)

This app calculates air duct sizes for HVAC design. It solves for missing values like airflow or head loss, allowing users to set multiple limits simultaneously. Results are presented with buildable size steps and detailed engineering data, functioning fully offline.

**Highlights:** Airflow, head loss, velocity, or duct size calculation, Simultaneous head loss and velocity limit checking, Buildable size steps for fabrication, Offline functionality, IP and SI unit conversion, Multiple friction models and engineering data

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TruGrid Authenticator free?

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

### Is Easy Duct free?

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

### Which has better reviews, TruGrid Authenticator or Easy Duct?

Easy Duct is rated higher. TruGrid Authenticator averages 4.7 out of 5 from 16 ratings, while Easy Duct averages 5.0 from 1 ratings.

### Do TruGrid Authenticator or Easy Duct have ads?

Neither TruGrid Authenticator nor Easy Duct shows ads.

### Which is updated more often, TruGrid Authenticator or Easy Duct?

TruGrid Authenticator ships an update monthly, and Easy Duct every 2 days. Most recently, TruGrid Authenticator was updated on October 19, 2026 and Easy Duct 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.*