# Stair Calculator vs Stair Stringer

The clearest difference is review sentiment: Stair Stringer at 67% against Stair Calculator's 21%. Stair Stringer also leads on rating (4.7 vs 4.1) and in-app purchases (none vs 2). Stair Calculator's advantage is price (Free vs $1.99) and ratings volume (738 vs 86). On ads, device support and iOS requirement there is nothing between them.

Stair Calculator is free to download; Stair Stringer costs $1.99 up front. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year. Stair Stringer asks for nothing beyond the download.

Stair Stringer holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Stair Calculator has 738 ratings behind it against 86, so its average is the more settled of the two. Written reviews point the same way: 21% of Stair Calculator's written reviews are positive against 67% of Stair Stringer's.

Stair Calculator ships an update every 3 months, Stair Stringer every 5 weeks. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Stair Calculator | Stair Stringer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.1 (738 ratings)](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366/reviews) | **[4.7 (86 ratings)](https://appshunter.io/ios/app/stair-stringer/id1550828339/reviews)** |
| Number of ratings | **738** | 86 |
| Positive reviews | 21.4% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#126** |
| Size | 1 MB | 2 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [H3 Apps, LLC](https://appshunter.io/developer/598620927) |

## What reviewers say

### 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


### Stair Stringer

[App page](https://appshunter.io/ios/app/stair-stringer/id1550828339)

**Currently charting:** #126 Top Paid · Utilities (US App Store)

This app calculates all necessary measurements for building a stair stringer, including risers, run, angle, and length. Easily adjust parameters and switch between Imperial and Metric units. Share your calculated results via email or text.

**Highlights:** Calculates stair risers and run, Determines stair angle and stringer length, Calculates step height and tread depth, Determines the number of steps, Adjustable parameters, Imperial or Metric units, Share results via email/text

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

**In-app purchases:** none


## Frequently asked questions

### Is Stair Calculator free?

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

### Is Stair Stringer free?

Stair Stringer costs $1.99, with no in-app purchases.

### Which has better reviews, Stair Calculator or Stair Stringer?

Stair Stringer is rated higher. Stair Calculator averages 4.1 out of 5 from 738 ratings, while Stair Stringer averages 4.7 from 86 ratings.

### Do Stair Calculator or Stair Stringer have ads?

Neither Stair Calculator nor Stair Stringer shows ads.

### Which is updated more often, Stair Calculator or Stair Stringer?

Stair Calculator ships an update every 3 months, and Stair Stringer every 5 weeks. Most recently, Stair Calculator was updated on September 18, 2026 and Stair Stringer on September 23, 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.*