# Stair Calculator vs The Chippy Calc

The clearest difference is review sentiment: The Chippy Calc at 100% against Stair Calculator's 21%. The Chippy Calc also leads on rating (4.5 vs 4.1) and update cadence (every 2 months vs every 3 months). Stair Calculator's advantage is ratings volume (740 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year and The Chippy Calc sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

The Chippy Calc holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 2, 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 100% of The Chippy Calc's.

Stair Calculator ships an update every 3 months, The Chippy Calc every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Stair Calculator | The Chippy Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (740 ratings)](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/the-chippy-calc-builder-tools/id6499256065/reviews)** |
| Number of ratings | **740** | 2 |
| Positive reviews | 21.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1 MB | 76 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Vike Digital Pty Ltd](https://appshunter.io/developer/1742926734) |

## 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


### The Chippy Calc

[App page](https://appshunter.io/ios/app/the-chippy-calc-builder-tools/id6499256065)

This app provides carpenters, builders, and DIYers with precise, visual construction calculations. It offers specialized tools for stairs, decks, rafters, and more, with support for both metric and imperial units. All calculations can be saved and accessed offline.

**Highlights:** Visual results with scaled diagrams, Metric and imperial unit support, Offline functionality, 14+ specialized construction calculators, Stair, deck, and rafter calculations, Linear cut list optimization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Annually | $19.99 | per year |
| Lifetime Premium Access | $79.99 | one-time |


## Frequently asked questions

### Is Stair Calculator free?

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

### Is The Chippy Calc free?

The Chippy Calc is free to download, with in-app purchases available.

### Which has better reviews, Stair Calculator or The Chippy Calc?

The Chippy Calc is rated higher. Stair Calculator averages 4.1 out of 5 from 740 ratings, while The Chippy Calc averages 4.5 from 2 ratings.

### Do Stair Calculator or The Chippy Calc have ads?

Neither Stair Calculator nor The Chippy Calc shows ads.

### Which is updated more often, Stair Calculator or The Chippy Calc?

Stair Calculator ships an update every 3 months, and The Chippy Calc every 2 months. Most recently, Stair Calculator was updated on October 24, 2026 and The Chippy Calc 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.*