# Stair Calculator vs Polynomial Calculator

The clearest difference is price: Stair Calculator at Free against Polynomial Calculator's $3.99. Stair Calculator also leads on rating (4.1 vs 1.0) and ratings volume (740 vs 3). Polynomial Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.

Stair Calculator is free to download; Polynomial Calculator costs $3.99 up front. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year. Polynomial Calculator asks for nothing beyond the download.

Stair Calculator holds the better App Store score, 4.1 against 1.0. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 3, 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 0% of Polynomial Calculator's.

Stair Calculator ships an update every 3 months, Polynomial Calculator every 10 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Stair Calculator | Polynomial Calculator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.1 (740 ratings)](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/polynomial-calculator/id6446024788/reviews) |
| Number of ratings | **740** | 3 |
| Positive reviews | **21.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1 MB | 20 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## 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


### Polynomial Calculator

[App page](https://appshunter.io/ios/app/polynomial-calculator/id6446024788)

This application efficiently solves and simplifies polynomial expressions. It supports various operations like addition, subtraction, multiplication, division, factoring, and evaluation for algebraic functions. Ideal for students and professionals needing quick and accurate math solutions.

**Highlights:** Solve polynomial expressions, Simplify algebraic functions, Add, subtract, multiply, divide polynomials, Factor polynomials, Evaluate polynomials, Clean interface, Accurate results

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stair Calculator free?

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

### Is Polynomial Calculator free?

Polynomial Calculator costs $3.99, with no in-app purchases.

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

Stair Calculator is rated higher. Stair Calculator averages 4.1 out of 5 from 740 ratings, while Polynomial Calculator averages 1.0 from 3 ratings.

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

Neither Stair Calculator nor Polynomial Calculator shows ads.

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

Stair Calculator ships an update every 3 months, and Polynomial Calculator every 10 months. Most recently, Stair Calculator was updated on November 3, 2026 and Polynomial Calculator on November 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.*