# Double Unit Converter vs Unit Converter & Calculators

The clearest difference is in-app purchases: Double Unit Converter at none against Unit Converter & Calculators's 1. Double Unit Converter also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.6). Unit Converter & Calculators's advantage is update cadence (every 5 days vs monthly). On price and device support there is nothing between them.

Both are free to download. Unit Converter & Calculators sells 1 one-off in-app purchase. Double Unit Converter asks for nothing beyond the download.

Double Unit Converter ships an update monthly, Unit Converter & Calculators every 5 days. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Double Unit Converter | Unit Converter & Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 5 days** |
| Size | 9 MB | 34 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MIHAIL MILUSHEV](https://appshunter.io/developer/648847538) | [Umit YILMAZ](https://appshunter.io/developer/1772563348) |

## What reviewers say

### Double Unit Converter

[App page](https://appshunter.io/ios/app/double-unit-converter/id1451391414)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter & Calculators

[App page](https://appshunter.io/ios/app/unit-converter-and-calculators/id6736622331)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Double Unit Converter free?

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

### Is Unit Converter & Calculators free?

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

### Do Double Unit Converter or Unit Converter & Calculators have ads?

Unit Converter & Calculators shows ads; Double Unit Converter does not.

### Which is updated more often, Double Unit Converter or Unit Converter & Calculators?

Double Unit Converter ships an update monthly, and Unit Converter & Calculators every 5 days. Most recently, Double Unit Converter was updated on October 19, 2026 and Unit Converter & Calculators on October 8, 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.*