# Transify vs Duct Calculator.

The clearest difference is ads: Duct Calculator. at none against Transify's shown. Duct Calculator. also leads on iOS requirement (13.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Transify sells 2 one-off in-app purchases and Duct Calculator. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Transify | Duct Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/duct-calculator/id6756908372/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Monetization | — | Free with in-app purchases |
| Size | 62 MB | 39 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [AMARDEEP DHILLON](https://appshunter.io/developer/999752727) | [Sachinbhai Surani](https://appshunter.io/developer/1838685550) |

## What reviewers say

### Transify

[App page](https://appshunter.io/ios/app/transify-speech-translator/id6746731468)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Features | $3.99 | one-time |
| Remove ads | $3.99 | one-time |


### Duct Calculator.

[App page](https://appshunter.io/ios/app/duct-calculator/id6756908372)

This professional HVAC utility assists engineers and technicians with precise duct sizing and airflow calculations for ventilation systems. It simplifies essential calculations for both design and installation work, improving on-site efficiency.

**Highlights:** Calculate duct sizes using airflow (CFM) and velocity (FPM), Supports rectangular and round duct sizing in inches, Determine air flow rate in CFM, Calculate air velocity in FPM, Simple interface for fast on-site calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is Transify free?

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

### Is Duct Calculator. free?

Duct Calculator. is free to download, with in-app purchases available.

### Do Transify or Duct Calculator. have ads?

Transify shows ads; Duct Calculator. does not.

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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.*