# StairBuilderPro vs Sprinkler Zone Calculator

The clearest difference is price: Sprinkler Zone Calculator at Free against StairBuilderPro's $4.99. Sprinkler Zone Calculator also leads on review sentiment (100% vs 56%) and rating (4.3 vs 3.2). StairBuilderPro's advantage is iOS requirement (8.0 vs 15.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Sprinkler Zone Calculator is free to download; StairBuilderPro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sprinkler Zone Calculator holds the better App Store score, 4.3 against 3.2. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews point the same way: 56% of StairBuilderPro's written reviews are positive against 100% of Sprinkler Zone Calculator's.

StairBuilderPro ships an update every 8 months, Sprinkler Zone Calculator every 10 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | StairBuilderPro | Sprinkler Zone Calculator |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.2 (6 ratings)](https://appshunter.io/ios/app/stairbuilderpro/id576147785/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/sprinkler-zone-calculator/id6451001870/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | Paid | **Free** |
| Size | 12 MB | 11 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Greg Gabrio](https://appshunter.io/developer/304928742) | [Hunter Industries](https://appshunter.io/developer/710090127) |

## 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


### Sprinkler Zone Calculator

[App page](https://appshunter.io/ios/app/sprinkler-zone-calculator/id6451001870)

This tool helps calculate sprinkler system flow and zone capacity. It guides nozzle selection and determines the number of sprinkler heads per zone to maximize available flow. Built-in charts and configurable zone capacity simplify system planning.

**Highlights:** Calculate flow and zone capacity, Guide nozzle selection, Determine sprinkler heads per zone, Maximize available flow, Built-in nozzle performance charts, Configurable zone capacity

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

**In-app purchases:** none


## Frequently asked questions

### Is StairBuilderPro free?

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

### Is Sprinkler Zone Calculator free?

Sprinkler Zone Calculator is free to download, with no in-app purchases.

### Which has better reviews, StairBuilderPro or Sprinkler Zone Calculator?

Sprinkler Zone Calculator is rated higher. StairBuilderPro averages 3.2 out of 5 from 6 ratings, while Sprinkler Zone Calculator averages 4.3 from 3 ratings.

### Do StairBuilderPro or Sprinkler Zone Calculator have ads?

Neither StairBuilderPro nor Sprinkler Zone Calculator shows ads.

### Which is updated more often, StairBuilderPro or Sprinkler Zone Calculator?

StairBuilderPro ships an update every 8 months, and Sprinkler Zone Calculator every 10 months. Most recently, StairBuilderPro was updated on November 1, 2026 and Sprinkler Zone Calculator on November 5, 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.*