# Length Converter Pro vs Conversion Calculator

The clearest difference is update cadence: Length Converter Pro at every 5 days against Conversion Calculator's every 5 weeks. Length Converter Pro also leads on iOS requirement (13.4 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Length Converter Pro sells 3 in-app purchases, starting at $0.99 per 7 days and Conversion Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Length Converter Pro ships an update every 5 days, Conversion Calculator every 5 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Length Converter Pro | Conversion Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (165 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews)** |
| Number of ratings | — | **165** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 10 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) |

## What reviewers say

### Length Converter Pro

[App page](https://appshunter.io/ios/app/length-converter-pro/id1621694392)

**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 |


### Conversion Calculator

[App page](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523)

This utility app offers a comprehensive unit conversion tool for various needs, including cooking, travel, and work. It supports over 120 units across 15 categories, with metric and imperial options. The app works offline and allows for customization of displayed decimals and category order.

**Highlights:** 15 categories and 120+ units, Metric and imperial conversions, Cooking, weight, length, temperature, and more, Offline functionality, Customizable decimal display, Apple Watch app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access forever | $8.99 | one-time |


## Frequently asked questions

### Is Length Converter Pro free?

Length Converter Pro is free to download, with in-app purchases available.

### Is Conversion Calculator free?

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

### Do Length Converter Pro or Conversion Calculator have ads?

Neither Length Converter Pro nor Conversion Calculator shows ads.

### Which is updated more often, Length Converter Pro or Conversion Calculator?

Length Converter Pro ships an update every 5 days, and Conversion Calculator every 5 weeks. Most recently, Length Converter Pro was updated on November 7, 2026 and Conversion Calculator on October 30, 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.*