# Units Free vs Unit Converter for Physics

The clearest difference is update cadence: Unit Converter for Physics at every 10 days against Units Free's every 5 months. Units Free's advantage is iOS requirement (5.1.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Units Free ships an update every 5 months, Unit Converter for Physics every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Units Free | Unit Converter for Physics |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 2 MB |
| Requires iOS | **5.1.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## 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 for Physics

[App page](https://appshunter.io/ios/app/unit-converter-for-physics/id6745997040)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Solution | $0.99 | one-time |


## Frequently asked questions

### Is Units Free free?

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

### Is Unit Converter for Physics free?

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

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

Neither Units Free nor Unit Converter for Physics shows ads.

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

Units Free ships an update every 5 months, and Unit Converter for Physics every 10 days. Most recently, Units Free was updated on October 24, 2026 and Unit Converter for Physics on October 24, 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.*