# Units+ vs Easy Duct

The clearest difference is in-app purchases: Easy Duct at none against Units+'s 2. Easy Duct also leads on ads (none vs shown) and update cadence (every 2 days vs every 5 months). Units+'s advantage is ratings volume (375 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Units+ sells 2 one-off in-app purchases. Easy Duct asks for nothing beyond the download.

Easy Duct holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Units+ has 375 ratings behind it against 1, so its average is the more settled of the two.

Units+ ships an update every 5 months, Easy Duct every 2 days. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Units+ | Easy Duct |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (375 ratings)](https://appshunter.io/ios/app/units-plus/id687296545/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/easy-duct/id6810881020/reviews)** |
| Number of ratings | **375** | 1 |
| Positive reviews | 85.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 3 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hebaallah Hossameldien](https://appshunter.io/developer/1632619093) | [Iman Alizadeh](https://appshunter.io/developer/6810881022) |

## What reviewers say

### Units+

[App page](https://appshunter.io/ios/app/units-plus/id687296545)

Easily convert between over 260 measurement units across 22 categories and get real-time currency exchange rates for more than 160 currencies. Quickly find units or bookmark frequent conversions for efficient use.

**Highlights:** 260+ measurement units, 22 unit categories, 160+ currencies, Real-time exchange rates, Unit search, Bookmarking conversions

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro Features | Free | one-time |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 👍 Reliable tool
- 👍 Versatile converter
- 👍 Great for various conversions (mass, temps, currency, distances)
- 👍 Does what it needs to do

**What reviewers complain about**

- 😠 Too many ads
- 😠 Ads without an X to close
- 😠 Negative sentiment towards the app's creator/provider (implied by one review)
- 😐 Fuel economy display issues (mpg/liters to 100)
- 😐 Some discrepancy in currency accuracy noted

**Reported bugs**

- Ads don't have an X to close

**Requested features**

- Add a Notification Center widget
- Way to mark favorite types of conversions


### 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 Units+ free?

Units+ is free to download, with in-app purchases available.

### Is Easy Duct free?

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

### Which has better reviews, Units+ or Easy Duct?

Easy Duct is rated higher. Units+ averages 4.8 out of 5 from 375 ratings, while Easy Duct averages 5.0 from 1 ratings.

### Do Units+ or Easy Duct have ads?

Units+ shows ads; Easy Duct does not.

### Which is updated more often, Units+ or Easy Duct?

Units+ ships an update every 5 months, and Easy Duct every 2 days. Most recently, Units+ was updated on October 15, 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.*