# Ductulator vs KNIPEX

The clearest difference is review sentiment: KNIPEX at 100% against Ductulator's 0%. KNIPEX also leads on rating (4.9 vs 1.0) and ratings volume (131 vs 2). Ductulator's advantage is update cadence (weekly vs every 3 months) and iOS requirement (13.0 vs 15.6). 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.

KNIPEX holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: KNIPEX has 131 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Ductulator's written reviews are positive against 100% of KNIPEX's.

Ductulator ships an update weekly, KNIPEX every 3 months. The most recent releases landed on September 26, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Ductulator | KNIPEX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/ductulator/id1528030964/reviews) | **[4.9 (131 ratings)](https://appshunter.io/ios/app/knipex/id1611568540/reviews)** |
| Number of ratings | 2 | **131** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free | Free |
| Size | 14 MB | 31 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Simon Leroux](https://appshunter.io/developer/1513421859) | [KNIPEX](https://appshunter.io/developer/1611568542) |

## What reviewers say

### Ductulator

[App page](https://appshunter.io/ios/app/ductulator/id1528030964)

This app provides a simple and efficient tool for calculating the dimensions of square ventilation ducts. It's designed for engineers, architects, and contractors to generate data for mechanical ventilation, cooling, and HVAC projects. Quickly validate residential and commercial solutions with this easy-to-use calculator.

**Highlights:** Calculate equivalent round diameter of square ducts, Convert square duct dimensions by volume ratio, Provide metric equivalence, Validate residential and commercial solutions, Designed for engineers and architects

**Features:** macOS Compatibility

**In-app purchases:** none


### KNIPEX

[App page](https://appshunter.io/ios/app/knipex/id1611568540)

Easily locate the perfect pliers from an extensive catalog. Browse product details, save preferred items to a personal wish list, and ensure you always have the right tool for the job.

**Highlights:** Find the right pliers, Access entire product range, View product details, Save favorites to wish list

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and intuitive
- 💡 Helpful for finding the right tool
- 🚀 Fast and efficient search
- 👍 Well-organized catalog
- 💡 AR feature is innovative and useful

**What reviewers complain about**

- 💡 Could be faster in animations/transitions
- 💡 Missing video demonstrations for tools

**Requested features**

- Video demonstrations for each tool
- Ability to compare multiple products
- Direct in-app purchasing
- More applications listed in search filters


## Frequently asked questions

### Is Ductulator free?

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

### Is KNIPEX free?

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

### Which has better reviews, Ductulator or KNIPEX?

KNIPEX is rated higher. Ductulator averages 1.0 out of 5 from 2 ratings, while KNIPEX averages 4.9 from 131 ratings.

### Do Ductulator or KNIPEX have ads?

Neither Ductulator nor KNIPEX shows ads.

### Which is updated more often, Ductulator or KNIPEX?

Ductulator ships an update weekly, and KNIPEX every 3 months. Most recently, Ductulator was updated on September 26, 2026 and KNIPEX on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*