# Fraction Help Calculator vs Duct Calculator

The clearest difference is price: Fraction Help Calculator at $2.99 against Duct Calculator's $19.99. Fraction Help Calculator also leads on rating (4.8 vs 4.5) and iOS requirement (12.0 vs 15.0). Duct Calculator's advantage is update cadence (every 2 months vs every 13 months) and ratings volume (189 vs 12). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Fraction Help Calculator costs $2.99 and Duct Calculator $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fraction Help Calculator holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Duct Calculator has 189 ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 50% of Fraction Help Calculator's written reviews are positive against 57% of Duct Calculator's, so the app with the better star average is not the one people write more warmly about.

Fraction Help Calculator ships an update every 13 months, Duct Calculator every 2 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Fraction Help Calculator | Duct Calculator |
| --- | --- | --- |
| Price | **$2.99** | $19.99 |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/fraction-help-calculator/id413490922/reviews)** | [4.5 (189 ratings)](https://appshunter.io/ios/app/duct-calculator/id1078238132/reviews) |
| Number of ratings | 12 | **189** |
| Positive reviews | 50.0% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 2 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Pheinex, LLC](https://appshunter.io/developer/996932317) |

## What reviewers say

### Fraction Help Calculator

[App page](https://appshunter.io/ios/app/fraction-help-calculator/id413490922)

This utility app simplifies fraction calculations and provides step-by-step solutions for addition, subtraction, multiplication, and division. It also facilitates conversions between decimals and fractions, and helps find factors of numbers.

**Highlights:** Solve fraction equations, View detailed working, Work with mixed fractions, Convert between decimal and fraction, Find factors of numbers

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

**In-app purchases:** none


### Duct Calculator

[App page](https://appshunter.io/ios/app/duct-calculator/id1078238132)

This app allows HVAC professionals to quickly and accurately size new ducts or calculate the performance of existing ones. It supports both round and rectangular ductwork, offering precise calculations through direct entry or intuitive sliders. The tool provides live updates and outputs key performance metrics.

**Highlights:** Size round and rectangular ductwork, Adjust airflow, diameter, width, and height, Direct number entry for precision, Lockable dimensions for 'what-if' scenarios, Live update of calculated values, Outputs velocity and pressure drop, Supports IP and SI units

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fraction Help Calculator free?

Fraction Help Calculator costs $2.99, with no in-app purchases.

### Is Duct Calculator free?

Duct Calculator costs $19.99, with no in-app purchases.

### Which has better reviews, Fraction Help Calculator or Duct Calculator?

Fraction Help Calculator is rated higher. Fraction Help Calculator averages 4.8 out of 5 from 12 ratings, while Duct Calculator averages 4.5 from 189 ratings.

### Do Fraction Help Calculator or Duct Calculator have ads?

Neither Fraction Help Calculator nor Duct Calculator shows ads.

### Which is updated more often, Fraction Help Calculator or Duct Calculator?

Fraction Help Calculator ships an update every 13 months, and Duct Calculator every 2 months. Most recently, Fraction Help Calculator was updated on October 23, 2026 and Duct Calculator on October 22, 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.*