# Stair Calculator vs Stair Stringer Calculator Pro

The clearest difference is price: Stair Stringer Calculator Pro at Free against Stair Calculator's $1.99. Stair Calculator's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Stair Stringer Calculator Pro is free to download; Stair Calculator costs $1.99 up front. Stair Stringer Calculator Pro sells 1 one-off in-app purchase. Stair Calculator asks for nothing beyond the download.

## The numbers

| Metric | Stair Calculator | Stair Stringer Calculator Pro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 3 MB | 4 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Netflowers Inc.](https://appshunter.io/developer/1672067319) | [京昌 陈](https://appshunter.io/developer/6783155021) |

## What reviewers say

### Stair Calculator

[App page](https://appshunter.io/ios/app/stair-calculator-stringer-cut/id6810948163)

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

**In-app purchases:** none


### Stair Stringer Calculator Pro

[App page](https://appshunter.io/ios/app/stair-stringer-calculator-pro/id6817401495)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stair Stringer Pro | $9.99 | one-time |


## Frequently asked questions

### Is Stair Calculator free?

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

### Is Stair Stringer Calculator Pro free?

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

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

Neither Stair Calculator nor Stair Stringer Calculator Pro shows ads.

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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.*