# StairBuilderPro vs RoofCalc

The clearest difference is price: RoofCalc at Free against StairBuilderPro's $4.99. RoofCalc also leads on rating (3.8 vs 3.2) and update cadence (monthly vs every 8 months). StairBuilderPro's advantage is review sentiment (56% vs 20%) and in-app purchases (none vs 2). On ratings volume, ads and device support there is nothing between them.

RoofCalc is free to download; StairBuilderPro costs $4.99 up front. RoofCalc sells 2 in-app purchases, starting at $1.99 per month. StairBuilderPro asks for nothing beyond the download.

RoofCalc holds the better App Store score, 3.8 against 3.2. Both are backed by a comparable volume of ratings — 6 and 12 respectively. Written reviews complicate that: 56% of StairBuilderPro's written reviews are positive against 20% of RoofCalc's, so the app with the better star average is not the one people write more warmly about.

StairBuilderPro ships an update every 8 months, RoofCalc monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | StairBuilderPro | RoofCalc |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.2 (6 ratings)](https://appshunter.io/ios/app/stairbuilderpro/id576147785/reviews) | **[3.8 (12 ratings)](https://appshunter.io/ios/app/roofcalc-roofing-calculator/id1014237429/reviews)** |
| Number of ratings | 6 | **12** |
| Positive reviews | **55.6% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 12 MB | 24 MB |
| Requires iOS | **8.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Greg Gabrio](https://appshunter.io/developer/304928742) | [Infoguide Pty Ltd](https://appshunter.io/developer/920670841) |

## What reviewers say

### StairBuilderPro

[App page](https://appshunter.io/ios/app/stairbuilderpro/id576147785)

This iPad app simplifies stair stringer layout by calculating and plotting all necessary points on your board. It eliminates the need for specialized tools and prior knowledge, guiding users through the process with visual aids. Works with both imperial and metric measurements.

**Highlights:** Graphical interface for dimension entry, Automatic plotting of stringer points, Step-by-step visual guidance, Imperial and metric measurement support, Eliminates need for framing square, Connect-the-dots cutting method

**Features:** macOS Compatibility

**In-app purchases:** none


### RoofCalc

[App page](https://appshunter.io/ios/app/roofcalc-roofing-calculator/id1014237429)

This app assists roofing and framing carpenters with complex calculations for various roof types and stud walls. It offers metric and imperial unit conversion, a standard calculator, and the ability to share results via email or message. Optimized for iPhones and iPads, it's designed for ease of use by construction professionals.

**Highlights:** Hipped, gabled, and single-pitch roof calculations, Stud wall calculations and estimating, Metric and imperial unit conversion, Standard calculator and quick converter, Print, email, or message results, Default value settings

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $12.99 | per year |


## Frequently asked questions

### Is StairBuilderPro free?

StairBuilderPro costs $4.99, with no in-app purchases.

### Is RoofCalc free?

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

### Which has better reviews, StairBuilderPro or RoofCalc?

RoofCalc is rated higher. StairBuilderPro averages 3.2 out of 5 from 6 ratings, while RoofCalc averages 3.8 from 12 ratings.

### Do StairBuilderPro or RoofCalc have ads?

Neither StairBuilderPro nor RoofCalc shows ads.

### Which is updated more often, StairBuilderPro or RoofCalc?

StairBuilderPro ships an update every 8 months, and RoofCalc monthly. Most recently, StairBuilderPro was updated on October 23, 2026 and RoofCalc 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.*