# Units Free vs Unit Converter

The clearest difference is in-app purchases: Unit Converter at none against Units Free's 1. Units Free's advantage is ads (none vs shown) and iOS requirement (5.1.1 vs 14.0). On price, update cadence and device support there is nothing between them.

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

Units Free ships an update every 5 months, Unit Converter every 8 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Units Free | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/units-free/id510615778/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 6 MB |
| Requires iOS | **5.1.1** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [RAJAMRAGHU TECH](https://appshunter.io/developer/1772439027) |

## What reviewers say

### Units Free

[App page](https://appshunter.io/ios/app/units-free/id510615778)

Easily convert between various units across multiple categories like length, temperature, and weight. Access past conversions through a history list and send calculations via email. This free version offers core functionality with an option to upgrade for full category access.

**Highlights:** Multiple unit categories (length, temp, weight, etc.), Metric and imperial system support, Conversion history list, Send calculations via email, iPad multitasking support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Units Free Upgrade | $0.99 | one-time |


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-simple/id6450880292)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Units Free free?

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

### Is Unit Converter free?

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

### Do Units Free or Unit Converter have ads?

Unit Converter shows ads; Units Free does not.

### Which is updated more often, Units Free or Unit Converter?

Units Free ships an update every 5 months, and Unit Converter every 8 months. Most recently, Units Free was updated on October 24, 2026 and Unit Converter on October 18, 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.*