# Pro Unit Converter vs CalcBin

The clearest difference is ads: Pro Unit Converter at none against CalcBin's shown. Pro Unit Converter also leads on update cadence (daily vs every 6 months) and iOS requirement (11.0 vs 14.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Pro Unit Converter sells 1 one-off in-app purchase and CalcBin sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pro Unit Converter ships an update daily, CalcBin every 6 months. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Pro Unit Converter | CalcBin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 6 months |
| Monetization | Free | — |
| Size | 37 MB | 17 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Quang Tri Mai Nguyen](https://appshunter.io/developer/1626809833) | [Joaquin Alejandro Bondulich](https://appshunter.io/developer/1361881385) |

## What reviewers say

### Pro Unit Converter

[App page](https://appshunter.io/ios/app/pro-unit-converter/id6452273430)

This free utility app offers a quick and convenient way to convert various units with a beautiful and intuitive interface. Save frequently used conversions for easy access and convert everything from area and length to temperature and data.

**Highlights:** Multiple conversion categories, Save frequent conversions, Intuitive user interface, Quick input and results, Beautiful design

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all Ads in the app | $0.99 | one-time |


### CalcBin

[App page](https://appshunter.io/ios/app/calcbin/id6630368724)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Pro Unit Converter free?

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

### Is CalcBin free?

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

### Do Pro Unit Converter or CalcBin have ads?

CalcBin shows ads; Pro Unit Converter does not.

### Which is updated more often, Pro Unit Converter or CalcBin?

Pro Unit Converter ships an update daily, and CalcBin every 6 months. Most recently, Pro Unit Converter was updated on October 6, 2026 and CalcBin on October 1, 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.*