# StairBuilderPro vs Piper Inventory

The clearest difference is price: Piper Inventory at Free against StairBuilderPro's $4.99. Piper Inventory also leads on review sentiment (100% vs 56%) and rating (3.7 vs 3.2). StairBuilderPro's advantage is in-app purchases (none vs 2) and iOS requirement (8.0 vs 14.0). On ratings volume, update cadence and ads there is nothing between them.

Piper Inventory is free to download; StairBuilderPro costs $4.99 up front. Piper Inventory sells 2 in-app purchases, starting at $22.00 per month. StairBuilderPro asks for nothing beyond the download.

Piper Inventory holds the better App Store score, 3.7 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 Piper Inventory's.

StairBuilderPro ships an update every 8 months, Piper Inventory every 6 months. The most recent releases landed on September 25, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | StairBuilderPro | Piper Inventory |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.2 (6 ratings)](https://appshunter.io/ios/app/stairbuilderpro/id576147785/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/piper-inventory/id6469746367/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 months** |
| Monetization | **Paid** | Subscription |
| Size | 12 MB | 17 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Greg Gabrio](https://appshunter.io/developer/304928742) | [Piper Diagnostics LLC](https://appshunter.io/developer/1712591819) |

## 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


### Piper Inventory

[App page](https://appshunter.io/ios/app/piper-inventory/id6469746367)

Manage your warehouse or mobile workstation inventory on the go. Easily add items, set minimum quantities, and use a Bluetooth barcode scanner to track stock. Syncs between devices for collaboration and generates restock lists.

**Highlights:** On-the-go inventory management, Bluetooth barcode scanner support, Set minimum stock quantities, Restock list generation, Inventory history tracking, Multi-location account management, Spreadsheet upload for setup

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $22.00 | per month |
| Annual | $199.00 | per year |


## Frequently asked questions

### Is StairBuilderPro free?

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

### Is Piper Inventory free?

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

### Which has better reviews, StairBuilderPro or Piper Inventory?

Piper Inventory is rated higher. StairBuilderPro averages 3.2 out of 5 from 6 ratings, while Piper Inventory averages 3.7 from 3 ratings.

### Do StairBuilderPro or Piper Inventory have ads?

Neither StairBuilderPro nor Piper Inventory shows ads.

### Which is updated more often, StairBuilderPro or Piper Inventory?

StairBuilderPro ships an update every 8 months, and Piper Inventory every 6 months. Most recently, StairBuilderPro was updated on September 25, 2026 and Piper Inventory on October 3, 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.*