# StringerPro vs Stair Stringer Calculator Pro

The clearest difference is ads: Stair Stringer Calculator Pro at none against StringerPro's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. StringerPro sells 1 one-off in-app purchase and Stair Stringer Calculator Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | StringerPro | Stair Stringer Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 weeks |
| Size | 10 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ClearStack Apps](https://appshunter.io/developer/6798305739) | [京昌 陈](https://appshunter.io/developer/6783155021) |

## What reviewers say

### StringerPro

[App page](https://appshunter.io/ios/app/stringerpro-stair-calculator/id6799538997)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StringerPro Premium | $5.99 | one-time |


### 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 StringerPro free?

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

### Is Stair Stringer Calculator Pro free?

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

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

StringerPro shows ads; Stair Stringer Calculator Pro does not.

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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.*