# Stair Calculator Pro vs VIN Checker

The clearest difference is in-app purchases: VIN Checker at none against Stair Calculator Pro's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stair Calculator Pro sells 3 in-app purchases, starting at $0.99 per 7 days. VIN Checker asks for nothing beyond the download.

## The numbers

| Metric | Stair Calculator Pro | VIN Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/stair-calculator-pro/id6757703166/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Monetization | Freemium | — |
| Size | 2 MB | 25 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [Vasile Carazanu](https://appshunter.io/developer/1590005184) |

## What reviewers say

### Stair Calculator Pro

[App page](https://appshunter.io/ios/app/stair-calculator-pro/id6757703166)

This app quickly calculates stair dimensions like number of steps, total run, and stringer measurements. It supports real-time unit conversions between imperial and metric systems and includes a currency converter. Premium features require a subscription.

**Highlights:** Real-time stair dimension calculation, Imperial and metric unit conversion, Currency converter, Calculate number of steps from total rise, Cost calculation per step, Supports various input and output units

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per 7 days |
| Premium Access | $1.99 | per month |
| Premium Access | $5.99 | per year |


### VIN Checker

[App page](https://appshunter.io/ios/app/vin-checker/id6779218213)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stair Calculator Pro free?

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

### Is VIN Checker free?

VIN Checker is free to download, with no in-app purchases.

### Do Stair Calculator Pro or VIN Checker have ads?

Neither Stair Calculator Pro nor VIN Checker 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.*