# Units Free vs SimpleUnit Lite

The clearest difference is in-app purchases: SimpleUnit Lite at none against Units Free's 1. SimpleUnit Lite also leads on update cadence (every 5 days vs every 5 months). Units Free's advantage is device support (3 vs 1) and iOS requirement (5.1.1 vs 16.0). On price there is nothing between them.

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

Units Free ships an update every 5 months, SimpleUnit Lite every 5 days. The most recent releases landed on September 28, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Units Free | SimpleUnit Lite |
| --- | --- | --- |
| 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 | — |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 7 MB |
| Requires iOS | **5.1.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Nickolas Johnson](https://appshunter.io/developer/1710993762) |

## 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 |


### SimpleUnit Lite

[App page](https://appshunter.io/ios/app/simpleunit-lite/id6470175430)

**In-app purchases:** none


## Frequently asked questions

### Is Units Free free?

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

### Is SimpleUnit Lite free?

SimpleUnit Lite is free to download, with no in-app purchases.

### Which is updated more often, Units Free or SimpleUnit Lite?

Units Free ships an update every 5 months, and SimpleUnit Lite every 5 days. Most recently, Units Free was updated on September 28, 2026 and SimpleUnit Lite on September 11, 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.*