# Construction Calc Pro vs Stair Calculator

The clearest difference is price: Stair Calculator at Free against Construction Calc Pro's $13.99. Stair Calculator also leads on rating (4.1 vs 2.5) and ratings volume (740 vs 11). Construction Calc Pro's advantage is in-app purchases (none vs 2) and review sentiment (42% vs 21%). On ads and device support there is nothing between them.

Stair Calculator is free to download; Construction Calc Pro costs $13.99 up front. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year. Construction Calc Pro asks for nothing beyond the download.

Stair Calculator holds the better App Store score, 4.1 against 2.5. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 42% of Construction Calc Pro's written reviews are positive against 21% of Stair Calculator's, so the app with the better star average is not the one people write more warmly about.

Construction Calc Pro ships an update monthly, Stair Calculator every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Construction Calc Pro | Stair Calculator |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | [2.5 (11 ratings)](https://appshunter.io/ios/app/construction-calc-pro/id458909118/reviews) | **[4.1 (740 ratings)](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366/reviews)** |
| Number of ratings | 11 | **740** |
| Positive reviews | **42.1% of reviews** | 21.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 1 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) |

## What reviewers say

### Construction Calc Pro

[App page](https://appshunter.io/ios/app/construction-calc-pro/id458909118)

This comprehensive calculator app is designed for construction professionals, offering specialized tools for measurements in feet, inches, and fractional inches. It includes modules for material estimates, conversions, area and volume calculations, trigonometry, and stair design, transforming your device into a powerful construction computer.

**Highlights:** Calculations in feet, inches, and fractional inches, Material estimation modules, Conversions for various units, Trigonometry and triangle solving, Stair and arc calculations, Fraction reduction and conversion, 50 memory slots

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

**In-app purchases:** none


### Stair Calculator

[App page](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366)

This app calculates essential parameters for stair construction, offering flexibility in input and providing multiple step set options. It supports various units and allows results to be easily copied.

**Highlights:** Calculate stair construction parameters, Flexible input for Run or Total Run, Determine largest and smallest step sets, Support for various units, Copy results to clipboard

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Premium Package | $9.99 | per year |
| Unlock all features | $5.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Helpful information
- 🚀 Provides useful calculations

**What reviewers complain about**

- 🐛 Doesn't work as expected
- 🔒 No way to cancel subscription
- 🔒 Difficult to cancel trial
- 🤬 Obnoxious ads
- 🤬 Misleading as a learning tool

**Reported bugs**

- Subscription numbers don't add up
- Doesn't provide promised features after purchase

**Requested features**

- Option to uninstall app
- Ability to calculate run based on rise and landing space
- Provide more detailed diagrams and visuals


## Frequently asked questions

### Is Construction Calc Pro free?

Construction Calc Pro costs $13.99, with no in-app purchases.

### Is Stair Calculator free?

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

### Which has better reviews, Construction Calc Pro or Stair Calculator?

Stair Calculator is rated higher. Construction Calc Pro averages 2.5 out of 5 from 11 ratings, while Stair Calculator averages 4.1 from 740 ratings.

### Do Construction Calc Pro or Stair Calculator have ads?

Neither Construction Calc Pro nor Stair Calculator shows ads.

### Which is updated more often, Construction Calc Pro or Stair Calculator?

Construction Calc Pro ships an update monthly, and Stair Calculator every 3 months. Most recently, Construction Calc Pro was updated on October 24, 2026 and Stair Calculator on October 24, 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.*