# Length Converter vs SideKey

The clearest difference is rating: Length Converter at 4.8 against SideKey's 1.0. Length Converter also leads on in-app purchases (none vs 3) and ratings volume (12 vs 1). SideKey's advantage is update cadence (every 5 days vs every 72 months). On price and ads there is nothing between them.

Both are free to download. SideKey sells 3 in-app purchases, starting at $3.99 per 7 days. Length Converter asks for nothing beyond the download.

Length Converter holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Length Converter has 12 ratings behind it against 1, so its average is the more settled of the two.

Length Converter ships an update every 72 months, SideKey every 5 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Length Converter | SideKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/length-converter/id1533575399/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/sidekey-custom-action-button/id6814712920/reviews) |
| Number of ratings | **12** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 5 days** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 75 MB |
| Requires iOS | **13.4** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [Ahmet Giray Ucar](https://appshunter.io/developer/1583246836) |

## What reviewers say

### Length Converter

[App page](https://appshunter.io/ios/app/length-converter/id1533575399)

Easily convert lengths between various units including feet, inches, meters, decimeters, centimeters, and millimeters. This tool is designed for quick and accurate conversions for a wide range of users.

**Highlights:** Converts feet, inches, meters, decimeters, centimeters, millimeters, Fast and accurate conversions, User-friendly interface, Supports multiple units

**Features:** macOS Compatibility

**In-app purchases:** none


### SideKey

[App page](https://appshunter.io/ios/app/sidekey-custom-action-button/id6814712920)

This app allows you to customize your iPhone's Action Button with a personalized launcher for your favorite tools and shortcuts. Organize actions into profiles, access useful utilities like a private camera and QR code generator, and integrate with Apple Shortcuts.

**Highlights:** Personalized Action Button launcher, Customizable action profiles, Private camera with locked library, QR code generator, Find my car feature, Integration with Apple Shortcuts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SideKey+ Weekly | $3.99 | per 7 days |
| SideKey+ Monthly | $7.99 | per month |
| SideKey+ Yearly | $24.99 | per year |


## Frequently asked questions

### Is Length Converter free?

Length Converter is free to download, with no in-app purchases.

### Is SideKey free?

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

### Which has better reviews, Length Converter or SideKey?

Length Converter is rated higher. Length Converter averages 4.8 out of 5 from 12 ratings, while SideKey averages 1.0 from 1 ratings.

### Do Length Converter or SideKey have ads?

Neither Length Converter nor SideKey shows ads.

### Which is updated more often, Length Converter or SideKey?

Length Converter ships an update every 72 months, and SideKey every 5 days. Most recently, Length Converter was updated on October 29, 2026 and SideKey on October 29, 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.*